Genuine Small-Block Chevy DZ 302 Build

Canadian born Martin Maltesen has spent years restoring this legendary Chevy DZ 302 cubic-inch to original specs using Wayne Guinn's book Camaro Untold Secrets. Martin chose only the best to assembly and tune the engine! We were happy to help him achieve goal!

[@irocitZ]

In a world of L79s & LT1 engines, this mostly stock 302 has gotta be the most impressive small block ever. It's mind-blowing, I love it..

[@stevejewell9263]

Not really. The LT-1 350 is basically the same engine as a 302. All the same level of tech in it. More displacement but other wise the same engine tech throughout. The DZ302s only advantage is also it's disadvantage vs the LT1. The short stroke makes it potentially capable of little more RPM than the LT1 350 but that won't make up for the 350s higher torque, bigger HP and flatter curve across the RPM range. It's important to remember that the 302 wasn't a size chosen by Chevrolet as having any advantage vs something larger. It was simply a result of the 305 cu in limit in the Trans Am rule book for the class.

[@irocitZ]

@@stevejewell9263 all in all the 350 LT1, 327 L79 and 302 DZ are all similar performance wise the way they left the factory. I never dyno tested an original DZ engine but the word is that it makes closer to 400 hp than it does to 300 like GM claims. I do understand why this engine came about, my point is that regarding the three engines I see a lot less of the 302 than I do the others (in person). There's no question that all three are legendary small blocks, anyone who had the pleasure of driving a car for the first time with either of the 3 engines when new were probably all blown away. Also, imagine how the car with the big block at the light next to a Z28 felt after that light turned green? And then finding out it was just a 302 CI engine...just a different perspective, that's all..

[@stevejewell9263]

@@irocitZ A stock issued DZ302 probably made more than 300HP for sure. Cheverolet as much admits that by quoting the 290HP reading at 5,800. It's was far from a big secret that the motor could spin faster and it wasn't yet at it's peak when crossing the 5,800 mark. Peak power was found in 6,500RPM range. GM did this pretty often. They did the same with the race oriented L88 427 Big Block as well. Both engines share another trait. Time!! As time has past the racing stories and street car stories have merged. As often as I've heard people say the 302 made more than 290 and more like 400HP I've also head the L88 made more than the 430HP rating and it probably made more like 500-550HP. To which I say, "Nope!" Not in street trim they didn't not even close. I believe both inflated HP number stories come from the same misconception though. They share some truth and some embellishment due to time past. It's well documented that the Trans Am racers who took delivery of the 302 small blocks and the full on drag racing teams that took delivery of the L88 Big Blocks both immediately ripped those engines apart and went through them doing all they were allowed to in the rule book to make 'em better. Porting heads, intakes, working the carburaters and then doing headers and extension length tuned for the most power they could find and they were indeed getting 400HP out of the DZ302 and maybe even as much a 550HP out of that insane L88 427......... but for mere mortals with street cars, not nearly, so worked over.....no way they were getting these power numbers or anything remotely close to 'em in stock trim and full length street car exhaust systems. Yet, all of these stories are now 50 years back in time. So......small wonder the big numbers from race car efforts are what everyone quotes today as the real world street car performance, That may explain it but it sure doesn't make it so. Reasonable best guess for the stock 302 is power in the 330-350HP range and you spin the crap out of it to get there too. "PEAKY" is how I'd describe the '69 I owned back in the day. Not half bad at the drag strip but way down on power on the street at more reasonable in traffic RPM.

[@ralphmckee5828]

Its so nice to see that the 302 CID crowd is still alive and well , and willing to do what it takes to reproduce one of chevrolets most fabeled and fastest small blocks ever produced , Ived owned a number of factory built big block cars over the 56 years i have been driving, not one has ever run as fast as the 302 Z28 s of the late 1960s , with out being modified.... straight off of the local chevy dealers shpw room , they would spoil your undefeated saturday night .at the turn of the light... 290 hp my ass . its a great choice Martin Malteson. best of luck with your build , and long live Fossal Fuels !

[@kurtbyars766]

LOL ! I had one original matching numbers 69 Z28 Camaro and everything you said is true ! I was only beat by a couple cars over a 2 or 3 year period and one was a guy with and old GTO with a turbocharger !!!

[@timricketts.]

I was told by a guy that worked at GM in the late 60's that the 302 hp was greatly underrated on paper. He said it had well over 409 HP from factory. ??

[@brad3139]

wasnt expecting 480hp/355 ft lbs, very impressive! 6:07

[@bobdobalina8910]

Even Better! 480hp @ 7100rpm 395ftlbs @ 5200rpm 6:09

[@billstovall3813]

It goes to show you the benefit of modern advancement, especially in cam specs. I'm not sure if they kept the heads stock, but there was always potential to increase flow on the fuelie heads.

[@buckykattguitar]

@@billstovall3813at the beginning he mentioned that the heads were done to Traco specs

[@stevejewell9263]

Yup. No way they go those numbers without a roller cam profile and heads worked to the MAX. As good as that horse power number is at 480HP the truly troubling number here is the sub-400Ft Pds of torque at a really high 5200RPM peak number of 395. Once again proving that this is the engine size MANDADTED in the Trans Am rule book and not the engine anyone should ever really want unless the rules prohibit anything larger. This engine is a great example of why the expression "no replacement for displacement" exists. Compare this 283 crankshaft stroke in a stock 350 bore, that makes it a 302 to what is way more common today, a 400 crankshaft stroke in the same 350 bore that makes the really popular 383. The short stroke engine makes power by screaming to nearly 8,000RPM and it takes a lot of really trick stuff to get there. The longer stroke 383 requires no super human effort to make as much or more horsepower at a more reasonable 5,500-6,000 RPM but where the bigger displacement really shines is in it's flat as Nebraska, broad torque curve that will show more 400FT PDs as low as 2,500 and carry that much and far more at it's peak going all the way to 5,000RPM before falling off. That's power a street car needs and uses vs a RACE CAR ENGINE that is represented really well by this tuned up 302. On a Trans Am race course you might never see anything bellow 3,500RPM for but a moment in a sharp corner on breaking and you'll spend most of the race wound out in the 5,000-7,000+ rpm range so a racer can do just fine with a 302 but on the street PEAKY is how I describe the 302 Chevy and super weak in the low and mid-range power. When you look at it this way it's easy to understand why only this one variant of the Camaro alone ever got this engine. Nobody should or would ever want it by choice unless they own a matching #s collectable Z/28 from '67-'69 it's pure race car stuff mandated by a rule book that limited these cars to 305cu inches or less. This is an engine that makes no sense in any street car vs the alternative choices that are just so much better you could make out of the super huge number of SBCs out there with a 4 inch bore.

[@gordocarbo]

@@stevejewell9263 Hot rodding doesnt have to make sense . All he has to do is gear it, car will be plenty fast .

[@MedicatedOMO]

I so miss my 302... What a fool I was as a kid. It came out of a Chevy II that was running 5.7 8ths. I twisted my 68 Chevelle's frame with it. Bought a sweet 70 Monte Carlo, but I should have kept that motor. 8200 RPM was a normal daily sound.

[@paulkendzor3895]

I have one. Had 4.88 gears when I bought it. Cross ram, off road cam. Balanced and blueprinted, MSD ignition. I agree with 480.

[@Dr.Meola1980]

I'm sorry I know you made this comment over two months ago. I'm not trying to be rude either. I'm just confused. Do you think your engine had 4.88 gearing? And it was blueprinted and balanced. A more interested in the question of what you think 4.88 gears are? And please do not take this as any disrespect I am just quite curious.🤔

[@kenschlosser5167]

@Dr.Meola1980 this engine was made by chevy in the late 60s he's referring to a z28 that was a option while buying the camaro you could chose that was the car this engine package was offered in

[@paulkendzor3895]

@@Dr.Meola1980 Odd, what do you think 4.88 gears are? I have since changed them to a 4.11 ring and pinion. I have also changed back to the original 780 four barrel. Much easier to tune on the street and more fun to drive day to day. Mine may not have made 480HP but I can tell you it wasnt far off. I had the chevy off road cam (made to use in T/A racing), not a custom. Mine also has shaved pistons bringing the compression down to 10:1 So I can run pump gas.

[@stevefick3919]

Those little 302's are just screamers! Sweet engine!

[@adrianwilson7193]

Mighty Mouse, in the house.

[@joe-hp4nk]

Smokey would have used his own manifold, the smokey ram developed by Smokey and produced by Edelbrock.

[@DavidB7474]

Yeah but I’ve talked to engine builders. And as cool as the SY1 Smokey ram is. I’ve been told you can make almost 50 more hp from a victor jr. I run a sy1 and run it on a mild 350 with the correct 830 Holley recommended by Smokey Yunick. No numbers but it feels strong, and pulls past 7k.

[@garyallen8869]

The biggest problem is not the smokey ram intake, it's people not realizing it was not in any way shape or form a bolt on intake, rest assured it could and did make power far beyond a victor Jr The reason it did not sell well was most people that bought them did not have the tuning knowledge or experience to make it work What many people didn't realize is for it to work as Smokey designed it to work, it needed a specific Racer Brown cam Smokey Spec'd for it specific size primary tube and collector size & length headers, and stagger jetting the carb with these parts it was far superior to the cross ram and any intake for road racing purposes at that time, but just as this video points out it is the correct combination of parts for the intended use, well thought out and engineered to work together, more often than not poor performance is due to mis matched parts and lack of experience

[@joe-hp4nk]

@@garyallen8869 You're right, the plenum on the smokey ram is much bigger than a single plane. It needs a bigger pump shot on the carburetor and big tube headers to make it work, as per Smokey Yunick.

[@garyallen8869]

@@joe-hp4nk bigger pump shot, stagger jetting because of the fuel distribution characteristics of the intake, specific cam, cylinder head runner volume etc, it was a very specifically designed intake, for a specific purpose

[@BillDiers-vb6xs]

Just finishing a 32 ford roadster with my dz 302 have had this motor since 1979 quick change rear and a muncie should be a really fun hot rod sounds great at about 7000 😊

[@stevenlaubach5947]

That is gonna be so much fun to drive!!!

[@25vrd48]

I saw my first Z-28 in 67 when I went to work at a local Chevy dealership . No badging indicating Z-28 until I looked at the window sticker and popped the hood of the wrecked Z-28 that the transport driver crashed into a light pole in the process of loading the car on the transport trailer . Special order Z-28 and it had creosote pieces still in the fender of the highly optioned Camaro . Car sat a couple of stalls away from my stalls and sat there for several months and one morning it was gone , never could get info as to where the car disappeared to . Sheet metal damage but not any sub frame or suspension damage .

[@mikester695]

A buddy had a new 68 z28, $2,700 new. The best part he totally abused it. The body would hit the frame when he flat shift 1st to 2nd. The 302 screamed abuse me more. He blew the doors off 327 Corvettes. It wouldn't run on anything less than 101 octant and the lifters needed adjusting often. 10 years later he bought another 68, that someone else abused, for $10,000 and put another 5 Large into restoring it. Kids with union jobs.

[@williamfitts3893]

One of the guys at work brought his 302 in ,it has angled 4 bolt main .we fixing to build this baby.

[@zapper302]

Love it. I had the ‘140 cam in my 69. The only real thing I did not like is that you have to remove the intake to remove rocker covers to adjust the valves.

[@stevenmarcinkowski8577]

I've done my homework on Smokey Yunick as well as the mastermind behind the Z28 Zora Arkus Duntov were beyond their time

[@johnsheetz6639]

That's badass! The trans Am cars were the best looking stance ever for a muscle car and it's not even my opinion it's just true this man's vision is fire!

[@ericvitelli7113]

That sounds sweet! I have a 67 Camaro with a 68 327. I will never upgrade the carburetor or sell it. Pure love.

[@rickweber4267]

I didn't have my glasses on and thought you were running a distributor out of the valve cover😮

[@jeffrobodine1850]

Mopar had a cross ram it was called a Max wedge The first race engine before The famous 426 Hemi true fact 💯💯👍👍😎

[@jb314stl]

This is the best engine on youtube!

[@OutlawMercenary]

Uploading a video about building a ''DZ302'' is a magnet for criticism, so many experts and historians, this alone make this venture an exercise self punishment. For this reason alone i've subbed the channel, not only for this video, but i'm hoping that maybe theres more footage on this build, i'd like to know more, like which fuellie head (or do others spell it ''fuelly'') is on that motor, (186 casting?), and is it still standard bore? What crank and rods are in it, all original gm? Maybe they mentioned these points and i missed it. I appreciate the intake and actually finding production # carbs, i recently ran into a friend who told me he ''got a holley at a garage sale'' for his street cruiser, when i saw the list # i went into an obvious state of shock, he couldnt understand my enthusiasm, i told him it was a carb off of a cross ram 302, he said he didnt know ford even put a cross ram on a 302......amazing. Look forward to this and other content in the future.

[@Youralwayswhining4367]

Got the same cross ram intake and carbs and acouple mo engines and dz engines . They can thump if built right

[@ajm1268]

You know what they say, they really go before they blow! 😮

[@jimsmirh2406]

Beautiful little mouse right there.

[@25vrd48]

A friend bought a new 69 Z-28 and wanted to race is in a sports car race being held in a local park that was perfect for these type races . i tuned the Z-28 and it had a set of Mickey Thompson Super Scavenger Headers and it was an early production Z-28 with chambered exhaust and Firestone Sports Car 200 tires . Cops didn't like the Chambered Exhaust as it was loud . GM discontinued the chambered exhaust due to law enforcement complaints . I worked at a Chevy dealership and got my buddy in the parts department to get me all of the part numbers and prices to convert the Z-28 into race trim . The parts list and total price for the over the counter parts added up really quick and my buddy had the ok from his father that was going to bankroll the transformation . Only thing that killed the project was the fact that my buddy would be trading his Z-28 for an Econoline van . . Well so much for the Z-28 to get to road race , I would have been the driver as my buddy didn't have a clue as to how to drive a race car . A lot of really good race cars were in the race and it was exciting , doubt if we would have done very well but I would have done the best I could . We did get to practice in it's current set-up and damn it was a thrill . The park was closed at night and we would practice at night after the rent-a-cop was off duty . Burnt a set of tires off the Camaro and couldn't buy another set of the Sports Car 200 tires as they were limited production . Did a lot of street racing and won 99 out of a 100 races . The Camaro was sold when it was about a year old and the fool driving it and his four passengers attempted to beat a train at a road crossing and lost killing everyone in the Camaro .

[@stevec.6819]

Had an opportunity to buy same cross ram less carbs at a swap meet at Super Chevy Sunday Maple Grove for $400 back in mid eighties.

[@jimjenkins3313]

Just awesome guys! Know I'm happy with my #'s matching '69 convertible with some rare options. Still would like a dual plane, long tubes, electronic ignition and port and polish my existing heads. I know better one's exist, yet? How much HP will a TH350 handle? Gracias!

[@robertbaker837]

Everything is correct. Right down to that Ford Racing breather.

[@salvatoregiovanni8967]

I can pick out a Pennsylvania accent every time. Ol boy with the earplugs is definitely from PA.

[@kb3tus]

Never knew we had accents lol

[@dannydobbs669]

Why is there a FORD push in cap on the valve cover on that beautiful master piece 😢😢😢😢😢

[@dannymostarac1799]

Sweet mill

[@chicanou-turn5056]

Bad ass 🔥🔥🔥

[@Lure-Benson]

I am 63 years old so I am of age to remember these Camaro's still many on the streets and remember the GM 302s. The low torque for hp is because if the short 3 inch stroke. I just did my first 383 stroker, I am amazed at the torque that matched for every 1 horsepower to 410 hp My work truck the 383 is going in is going to be a great pulling truck for my jet boat going to work as an Alaskan guide.

[@bigbelconut]

Should have built a 400, much better towing engine then the 383. I work in a machine shop machining and building engines, im not a fan of the 383, love the 400.

[@Lure-Benson]

@@bigbelconut The bigger story here is I called the machine shop not yet working on the 383 and asked them I found a 400 SBC can I just do it instead of the 383 and that started a Hugh this and that how bad 400 SBC are, so I didn't buy the 400

[@marcusa8007]

So on the smokey 302, the center dumps arent together like all small block chevy, so smokeys heads were a one off correct??

[@mattguadagno7707]

I’m a Chevy fan and of course a 302 fan but I have to point out there’s a typo it only made 355 foot pounds not 395.

[@Mike62501]

Is Bob Olson Still work there? He was a friend from the 70’s in Chicago IL

[@donaldtrussell3803]

Standing in the Dyno room while murdering the 302 is nuts go look Steve Morris Dyno room exploded view

[@richb4099]

My old friend and co-worker and dragracer Dennis running the dyno.....

[@skypuppy7724]

Great project. The little engine that could 😎 . Curious to know what was the valve train used? Stock studs and nuts? Lash set at? Did you use roller 1.52s?

[@kensalazar5066]

So the book is worth investing in, haven't thumbed thru it in some time. Solid cams were used. The 1st off road cam from GM was known as the "140" , last 3 digits of the part number...upgraded heaven duty valve springs were needed. Remember the stock 302 was already high performance. But they did tweak a bunch of things....testing was yielding HP numbers above 470+ , with plenty of room to go even higher....there was also a second off road cam used, not sure of the specs on either one..

[@jeanlawson9133]

Duntoff

[@dfwdodge]

Duntov. Original Z-28 cam was 30/30 Duntov. Music to the ears. No mistaking the sound of mechanical lifters.

[@beachboardfan9544]

What exhaust headers are they!?

[@user-us4pi8gc4f]

anyone else notice the ford breather cap?

[@thegearheadchico7759]

WHEW!!👍🔧

[@dannymostarac1799]

Nice

[@westmonroe-r1v]

In 1980 I brought a 69 z28 with all that stuff on it what a pig around town, put a single holley on it big differences.

[@paulkendzor3895]

4.88 pinion helped with driveability, but kept me off the freeway.

[@lionelwells5618]

Very impressive

[@georgemartin7219]

There is a Ford logo on the right valve cover breather?

[@vrm86gt]

Awesome! Mighty Mouse! spun it up to 7500 rpm also! what does the valvetrain consist of?

[@netrioter]

They can be taken up to 8500 safely

[@user-mc9om5di1f]

I bought a new Z28 Camaro in 1968. I sold it in 1975 for twelve hundred dollars. It still ran and looked like the day I bought it. I wonder what it would be worth today?

[@randyjohnson-er9rd]

Just recently watched a video on engine masters dyno & tune a cross ram vs a tunnel ram and there was very little difference hp wise and the cr made more torque

[@zAvAvAz]

You should use a 400 block for the large bore, keep the 3" crank. It'll help that intake.

[@poortouringhotwiregarage5617]

The whole reason for running the 302 was / is to meet TA class rule requirements of below 305 cid

[@zAvAvAz]

@@poortouringhotwiregarage5617 quite correct.

[@JimBronson]

You can make more power with late 90s Vortec heads than any fuellie heads from back in the day, but why would you do that if you've got a real 69 Z-28? It's a period piece to be properly enjoyed with the proper parts. You can buy a 1st gen garden variety survivor with faded paint and a Blue Flame 6 for relatively cheap and throw the 406 in there with aftermarket cylinder heads, solid roller cam and a 950XP Holley and run fast at the dragstrip, those lower value cars are where you go with the non-factory stuff. Not a real Z-28.

[@gordocarbo]

@@JimBronson Think the vortecs are overrated it takes a ton of work to make em move much air there are too many bogus flow #s out there He wanted to copy a Yunick/Traco build just for fun cant knock a guy for that

[@correctpolitically4784]

I think I'd like to put a 3 inch stroke in a 96 block with a roller cam and vortec heads.

[@JoshLooperMusic]

I’ve rode in a MO 302 67 z28 and I can tell you it’s scary.

[@brucegillies1694]

Same equip on a 327 is Superior less 400 RPM

[@micahcastillo9113]

A 327 will rev just like the 302 and make even more power. The 302’s had to be built to meet a displacement limit to compete in SCCA.

[@rosskrause3926]

@@micahcastillo9113 I took my 327 to 8000 rpm many times..I did build the bottom end with good parts so it could handle it.

[@craigcampbell5129]

Are those 186 heads

[@maxpower2490]

This Ford breather cap really disgusts me.

[@RealGenX]

That’s original lol

[@gordocarbo]

Buddy has valve covers mounted upside down with the Ford insignia on them Purists go nuts at car hops

[@jb314stl]

Now that you pointed it out, Im feeling a little nauseous myself😆

[@ronaldschoolcraft8654]

I have two sets of those heads.

[@flflash4717]

480hp@7100rpm is very respectable for a stock head 302 ci engine

[@micahcastillo9113]

That’s generally what the race prepped 302’s generated. I think he did mention that the heads were ported like the original Traco built race engines, so that is a realistic number.

[@zAvAvAz]

and it's a smooth driver

[@marcmo7138]

@@zAvAvAz Weren't they a solid lifter engine?

[@zAvAvAz]

@@marcmo7138 The DZ 302 was a solid lifter engine and helped produce better torque throughout with more rpm. With modern improvements and talented head work engine work these engines really come alive even with streetable qualities.

[@marcmo7138]

@@zAvAvAz I would think having to adjust valves would get old in a street driven car.

[@physicsphirst191]

I have the original Chevrolet Trans Am engineering specs and chassis prep information on ebay.

[@Stevesbe]

Looks like oil pressure dropped at the top end it probably sucked the pan dry😊

[@larryreagan6936]

I have an mo code 67 302 in my old drag car, I don't even run it anymore.

[@larrywarner9314]

That's a 0010 block witch is a 350 if I'm correct .

[@jbsmudslide68z33]

The 010 block could be a 2 bolt or a 4 bolt main 302, 327, and the 350.. I know in 69 it came with a 4 bolt main for he DZ 302. It all depends on what crankshaft and pistons were used with it.

[@gordocarbo]

It could be a number of different ones, nothing special about them.

[@NicholasZak]

i have a 69 camaro z28 Trans Am Penske Replica. Im looking for a 302 to this type of caliber. Possible to get this motor build? Can someone reach out to me? Thank you

[@kurtbyars766]

Might try Patterson racing Augusta Kansas !!

[@craigtripp5509]

What are you looking to build

[@gordocarbo]

Make it easy on yourself and your wallet Use a good 4 bolt 350 block and find a 3" forged crank your ahead of the game.

[@realnikonlover6207]

That is music. All 8 cylinders.

[@yvbiron6580]

build with 350 bloc

[@ericheine2414]

A Snappy 480

[@MattsMadnessOfficial]

Why build them and never USE them...I run the hell out of my 302's

[@machdaddy6451]

Were these engines ever capable of 9000rpm?

[@stevejewell9263]

HELL NO!! That said though. Every trick GM had at the time went into these engines. They got best of the bottom end parts you could get. Forged parts from the pistons on down to the crank. Free floating wrist pins too. The SLOW PISTON SPEED of the 302 was another big piece of the puzzle that allowed for high RPM use. Short strokes reduce the "snatch load" of each change in direction of the piston at the top and bottom of the stroke. It all adds up to a SBC capable of living with sustained high RPM use without bottom end failure. 9,000RPM though......no chance...... and it's not nearly so much because of a problem in the bottom of the engine as it is in the top. Valve train parts that could survive 8,000RPM+ need to be light weight, high strength and pretty exotic/expensive. These are pieces that won't be found in a Z/28 302. You could add 'em but now your a BIZZILION MILES away from "stock" or even a well done Trans Am racer of the late 1960s.

[@machdaddy6451]

@@stevejewell9263 Very good explaination!

[@gordocarbo]

Not stock they couldnt. Built up yes but why?

[@markbly7062]

funny how the block casting number shows a 1969 to 1980 350 cubic inch in this video.. welp that is not 302 CID block casting number !!

[@robertbrissie8645]

Where is the block casting number shown? If it ends in "010" it is 100% correct for 69 Z/28. The 010 block use started in April of 69 and ran through 1980- same casting as used on 350. As long as the car is April 69' build or later, the 3970010 is the right one. Other earlier castings were 3956618 and 3932388. My Jan and March cars both used the 618 casting.

[@ralphsmith2683]

...and that's without a roller profile camshaft

[@gavincarroll2553]

Good lord almost 500 ho with only 302 cubes is abserd

[@shoominati23]

My friend dynoed his Z before he rebuild it on the engine dyno and it had about 365 still out of a worn engine , not bad for shitty double hump heads, OR a 2 bolt bottom end !

[@kennydemartini2169]

All 302's were large journal crank, four bolt main blocks...

[@biscuitboy3617]

@@kennydemartini2169 I thought 67/68 motors were small journal 2 bolt mains, and only the 69 (DZ) motors were large journal 4 bolts.

[@kennydemartini2169]

@@biscuitboy3617 I stand corrected, even though the '67 350 was a large journal crank, the four bolt main didn't happen until the '69 model year.

[@carlinshowalter1806]

@@kennydemartini2169 Nope,all 67s 302,327,350 used small journal block.

[@jamesshipley4985]

I believe that when I tore mine down for rebuild it had a bent connecting rod 🤯I must have missed a gear once🤣🤣🤯🤯

[@bobpickersgill4470]

Ford's 302 was still superior due to it's Cleveland heads. Parnelli Jones won with a Boss in 70, would of won '69 but tire failure prevented it.🏁

[@arkansasgreg]

Sure the Ford push cap took years to procure....js

[@darrellsomers5427]

The 302 is a victim of circumstance SCCA rules were 305 cubic inches or less ,run a 327 crank 3.25 stroke pull the same RPM and make more torque bill Jenkins ran the 3.25 stroke because of its RPM potential no rules on the street the 302 is just a glorified 283

[@carlinshowalter1806]

sure,you put 11:1 forged pistons and crank in a 283 with solid lifters and it will run like hell too!

[@bigbelconut]

283, best little engine chevy ever built, more of them on the drag strip in the 50s and 60s then on the street. My dad ran a 283 bored .125 =302 in the 60s at lions drag strip.

[@elmerfudpucker3204]

Then you would have a 327. If you're going to do that, then get a 400 block with a stroker crank. No replacement for displacement.

[@scooter1391]

dz motor had angled plugs those don't

[@scooter1391]

186 casting number mint want to check them

[@kurtbyars766]

I owned an almost brand new matching numbers 69 Z28 Camaro with EVERYTHING original and it didn't have angle plug heads. And I'm friends with a few people that have theirs still and we're not aware of that ever coming out with those heads.

[@scooter1391]

my best friend owned 1969 z28 and it had angled plugs double hump heads. just found some info the 186 castings are the real 302 deal...screw in studs, giude plates ,202 intake valves,,,sell em ! gm never had "factory" angle plugs... some were installed at the dealer level ( turbo, or bow tie castings) maybe this is why he had angled plugs on his anyway they where stolen by his cousin and sold

[@elmerfudpucker3204]

Angle plug heads were an over the counter head. The DZ and LT1 350 did not come out with angle plug heads.

[@scooter1391]

some were installed at the dealer level ( turbo, or bow tie castings) maybe this is why he had angled plugs on his anyway they where stolen by his cousin and sold

[@rickyriner1226]

Wrong heads DZ motors did not have bolt holes in them but right still heads

[@bigdon2241]

yes in 1969 the bolts hole where there the last year for the old pulley set up was 1968

[@kennydemartini2169]

@@bigdon2241 correct, and1969 went to the long water pump, except for Corvette.

[@bigbelconut]

Wow, some of you guys need to do some research before you open your mouth

[@johnvineyard67]

they never let it idle ,,,,, 1500 rpm ,,,? curves,, cheating ,,

[@gordocarbo]

Cant load the dyno that low, they arent cheating

[@kidnplaye4630]

Boss 302 would put that bowtie to bed

[@bigbelconut]

bahahaha. Then you woke up.

[@kidnplaye4630]

@@bigbelconut 480 myass

[@stefanovichmichael9686]

Never!

[@joe-hp4nk]

Not a good street engine, too low on torque. But cool to look at.

[@jordangazaway5834]

It never was designed for low end torque but made a lot of HP up over 5000 rpms where torque does not even come into play any longer anything over 5250 rpms torque falls off and HP takes over they were built for clutch dumping seat of the pants raw HP at high rpms and it is so weird to drive one cuz we're so not used to hearing anything rev that high on a regular basis but that's the way it was made and for the time beat everything in the trans am class under 305 cu inches that was the max allowed Chevy beat them all for at least 3 years in a row with that big jugged short stroked giant cammed big valves and the best flow characteristics to date for iron heads the double hump fuelies you couldn't even buy one with an automatic trans only the Muncie 4 speed was available for that reason it had no stump pulling torque but snatch second gear at 7 grand and it would break your neck and old friend he was much older than me had a 69 z28 rs ss and would tape a 100 dollar bill to the dash and say when I tell you to grab that 100 it's yours no one ever won that 100 dollars never and many tried too they all thought it was a joke that car was no joke not at all just a amazing piece of history and ahhh yeah as a daily it sucked a bit but to say it's just nice to look at well that's just crazy lol just my opinion I guess but living as a kid in the 70s a 69 z28 was every kids dream car omg I would have given my left nut for one but you couldn't fart around w it you had to basically drive it like you stole it and it was scary really scary no bullshit

[@joe-hp4nk]

@@jordangazaway5834 The longer you can hang on to torque the more HP you make up top. Torque + RPM = HP. Any short stroke engine will make lots of RPM because the piston speed slows the shorter the stroke. Double Hump heads needed a lot of work to perform but the potential was there. Trans Am racing made Z28s and BOSS 302s famous but rebuilds were numerous if you spun the street engine like you mention. That $100.00 trick was with a 427FE Cobra by the way.

[@howabouthetruth2157]

@@joe-hp4nk Dude........that "try to grab the $100 bill off the dash" challenge ( it's NOT "a trick" ) goes much further back then the 427FE Cobra engine. As a matter of fact, some hot rodders were doing the $100 bill on the dashboard challenge before the 1st big block was ever produced. You simply read some article or heard some popular story involving a 427FE Cobra, and assumed "that's where the $100 challenge came from".

[@joe-hp4nk]

@@howabouthetruth2157 What's your point?

[@kennydemartini2169]

@@jordangazaway5834 For crying out loud dammit, quit with that damn BS hundred dollar bill on the dash story. I've heard that story so many times. If you don't have enough core muscle to overcome 300 foot pounds of torque to be able to come out of your seat and reach a dash that is already within arms reach, then you wouldn't even be able to walk. SMFH. Think about it!.... I have a 302, and when I shift at 7000 rpms, my tires squeal a little. No broken necks yet....

[@kidnplaye4630]

Tracospecs still won't outflow boss heads stock flow 275 cfm Bowtie not close

[@Youralwayswhining4367]

You bumped your head kid

[@kidnplaye4630]

I got your kid right here assume the position

[@bigbelconut]

That's why chevys kicked there ass on the road course. Ford had good top speed but down low had no power because of huge ports.

[@kidnplaye4630]

@@bigbelconut chevy never jim hall chevy got its ass handed to him

[@gordocarbo]

Ford learned that to get there the ports had crappy airspeed/velocity which is why they used a tiny cam on them. Cfm isnt everything.

[@disolejunk]

That's an 010 block. 350 truck block from the 70s and early 80s....

[@rickroberts3610]

The 010 endacate that it is a high nickel block.witch is the better GM Cast block.

[@gordocarbo]

@@rickroberts3610 Unfortunately no, that is a myth

[@patrickbass3542]

NOt a "hemi"!

[@brianbloom1799]

I,m going to tell you men a sad, story, I know were there's a complete dz302 engine, That no one will ever get, The mans son went to Vietnam and never returned, The car rotted to the Ground, The motor sits, in a basement rotted to unrepairable condition, He would shoot you if you came close. Many people have tried to buy, 2 z28 cars rotted, but only 1 was a dz302, The cars and motors long gone now as of 2016 , He filled the motor with water and it just cracked everywhere, It was junked . SO SAD

[@kurtbyars766]

DAAAAUUUUUMMMMMM. 😢

[@NoPrivateProperty]

LS swap, better in every metric

[@gordocarbo]

DId they have LS back then?

[@gregorybarnes3526]

No torque means slow ass car

[@bigbelconut]

Unless your going 140 on a road course.

[@396375a]

I'm sorry, but a normally aspirated 302 with a flat tappet cam (I assume) making 480 HP seems like a stretch to me. If this motor had a solid roller with a set of AFR heads on it, I'd buy the 480 HP.

[@bigbelconut]

Wow, really you just watched it. Factory rated 290 just for insurance reasons. They actually made close to 450 at 7000 rpm. No body ran rollers back then, to expensive. 11.1 compression 2.02 valves studs guide plates ect ect. SCCA street legal race car.

[@gordocarbo]

SFT 302s would make that all day and then some. This has a custom solid roller and trick iron heads. Even at 2500 his engine is fairly smooth which says it will be more driveable than the sft cam

[@ronaldolweiler7745]

Whats the big deal ? A 327 block with a 28e crank . 202 heads and a crossram with a solid lift cam . I have run this in a 55 gasser since 1978 when I built it in votech . Its just a motor in an old car ! Get over it ! You have so much money in it you won't drive it or use it . Its a show car .

[@gordocarbo]

He says its going to be a street driven car that sees miles which is great Why down the guy sheesh .

[@willmckibban716]

there is no way in hell i would be standing in that room with it going to 8 grand, pure idiots, it decides to crap, bye bye

[@downback5822]

It's not a f'n FORD. Gosh

[@jimh4167]

Nice period correct motor Now I know the motor that tore my 2 barrel 289 1960 Ranchero up In a car it wound out of site..

[@Youralwayswhining4367]

They are meat to kid

[@gordocarbo]

My first thought!! My dyno guy wont let anyone in the dyno room or anywhere near a chassis dyno for a reason.

[@gregorybarnes3526]

Chevrolet syndrome.. Oil leaks galore

[@twolak1972]

480 Horse my ass. Those were pooches. Unless you had it pegged at 7 grand before shifting they were dogs. A 69 Boss 302 had 385 dyno,d hp and s Boss would waste any Z28. Know a guy that had a 70 Boss 302 and he lost to only 1 car ever . A 70 440 6pk 4 spd challenger. He said he was turned down rwice by 69 Z owners to RUN EM cuz they knew the BOSS wiuld waste their ass. Those cleveland heads made the Boss breathe fire .

[@stefanovichmichael9686]

What a pile of BS

[@FACEBOOKS-WBDS]

FORD MOTORCRAFT BREATHERS!!!! COME ON ATTENTION TO DETAILS!!!