Chevy 327 Breakdown

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[@cushionface09]

The 327 has always been near & dear to my heart . 307s are plentyfull & people dont want them so use the crank from a 307 put it in a 350 block & you have a 327 & you can use the 350 rod but you will still need the 327 piston. THX.

[@craigcampbell8560]

The 327 is easily the best old school small block ever built. I will ALWAYS build a 327 before I'll build a 350. They rev SO much better than the 350 that the slight loss in torque is WELL worth it.

[@kenswitzer4133]

I love my small journal👍🇺🇸🤙

[@incompetentobjectivist3850]

L79! The merry-go-round analogy reminds ! that there is a Grateful Dead song 'The Faster We Go, the Rounder We Get'!

[@JamesLeeBryan]

Years ago I had a '66 El Camino with a 327. Quietest smoothest motor I ever had and when you put your foot in it it was like a rocket ship.

[@cleaduskolache8519]

About to put one in my 64 elco

[@funes3699]

I got me a 327 block but has 350 heads u think it will be ok?

[@johncoyle707]

@@funes3699 yeah should work just fine just make sure u put good valve springs in there

[@zmxl1020]

Your clarity is and command of this subject is always welcome. Thanks for posting!

[@rsperryhouse]

Great Videos, I really like the in depth explanations, which explain the physics, cause, and effect of all the different variables that go into tuning an engine

[@JuanLopez-zf8zb]

Mr. Torres your videos have helped me so much with my chevy

[@IceCream-and-HeadLice]

Best analogy I’ve heard on explaining surface speed. Have wondered about the larger crank in 68-69 327. Thanks for info.

[@davidwood1923]

Thanks for Sharing the Video... I had one of those two year only 327 that was my first engine builds at 14yrs old... That was over 40yrs ago... It landed in a '66 Chevy II post car my first Hot Rod. I beat all kinds of cars only Central Ave. here in Phoenix. Good Times

[@johnmichaelgavin3617]

Hey really enjoying all the new videos lately! Been watching your videos for years now, so thanks for taking the time to share your insights!

[@Myvintageiron7512]

your welcome

[@Duddie82]

Thank you for the education on the 327 engine. I once had the opportunity to purchase a 327 for a 1978 build in the 80s. I passed because I had just purchased a 350. I wish I had purchased it. They were not asking very much. I verified with the numbers, it was a true early model 327. I wish I had that engine today.

[@jeffie8696]

My 68 Vette had a 327 and it was amazing. What made it excellent was the Camel Hump heads . It did rev very nicely.

[@gregorykennedy637]

A 327 has a better bore stroke ratio,they like to rev , not as good as a 302 ,but better than 350

[@mikejones2200]

I have a '67 2nd design crate engine, bought new in '73 NOS, that I have had in several vehicles. It may find its way into the '55 Sedan Delivery now that I have retired and have more time.. Good Vid, Good Channel. I'm subscribed. 67YO retired male in rural Colorado.

[@denismorissette419]

Always very interesting!! I want to point one thing today that you probably haven't hear very often and it is the quality of your language. You have a very good English whit a perfect pronunciation. It adds to the value of your explainations. Thank you!!

[@Myvintageiron7512]

Thank You

[@janlabij7302]

Glad you mentioned the SB 400. They were notorious for running hot in the summertime with the air conditoning on. They were not very economical either. They did not like hard running at all. I had one. It sucked. And not just gas. An old fashioned mechanic told me 'Never before has so much hot iron tried to cool itself with so little water'.

[@maxbrouggy3126]

Still running my small journal 327 crank in a brand new 4 bolt GM block with spacer bearings on the mains. The other thing that most don't know is every small journal 327 crank was forged from the factory.

[@motorman1873]

Max Brouggy I know I really miss my 62 had 365 free flow heads 11 and a 1/2 to 1 pop ups port matched everything crane 228 232 at 0 50 cam badass ignition system in a 2400 lb truck. Nothing like it. Until you build a Stout 383 pisses you off makes you wonder why you wasted all that time on that little 327

[@peterdragon9630]

I'd wondered how the spacer bearings held up, sounds like they do, thought about doing that myself since I have a 4 bolt block I could put my extra 327 sj crank in.

[@maxbrouggy3126]

@@peterdragon9630 2 years on and still no problems, I turn this 7,000 on the strip.

[@NaturesChild]

had to reminded me of the 327 365HP (matching numbers) '65 Corvette roadster that I passed on in the '80s... damn it!

[@michelebeauchamp9773]

Thank you for clearing up the air on the 327s. We got last year a 327 that my husbands step dad gave to him. He thought it came out of a 69 chevelle wagon, but after he ran the true numbers it was out of a 1968 camaro. So he is looking to build that engine eventually.

[@skypuppy7724]

Nice explanation on the 327 - I have a 68 Camaro with the original 2 bolt Large journal 327. Interesting about the 327's in '69 where block casting #3932386 was used for the 302 (DZ motor) - there were 2 versions , supposedly - 2 or 4 bolt. The DZ of course used the 4-bolt one.

[@stevenmarcinkowski8577]

Great info. Grew up on small block Chevys

[@ivanbadillo4909]

Thank you for this video. I have a numbers matching 67 327 impala convertible. This really helped put

[@frederickcandelaria3384]

Outstanding, I have a 62 327 cid with 80,000 original miles and I want to build a 302... Thank You for enlightening me...

[@DeliriumElectric]

Have to say I'm loving your channel. They way you speak and describe things is perfect. Don't know why but I've always loved the idea of a 327. Here in Australia the common V8 growing up (25 yrs ago) was the holden 308. 4 inch bore, but a small stroke. The chev guys nearly always went 350. There were a few 307's kicking around but the unique bore size meant that there weren't too many compatible parts kicking about. I'm starting to source parts for my build, and I think I might go 327. 350 block (maybe a later model roller), with a 327 LJ crank. I also believe I can use 5.85" rods with stock 350 pistons with this combo. Should be a nice bottom end which will handle some revs.

[@hilleryclifford2367]

Love the content craig. Im not banging on people, im just amazed at how much information has been lost that used to be common knowledge about small block chevs! Glad you're clearing some things up.rod & main journal sizes changed but ROD LENGTH STAYED CONSISTENT at 5.700.All GM did was moved the wristpin location on the piston! Exception: 400 sb wich is 5.565 for cam clearance. 327 were a fave for pro stock racers for many years the rod angle is the best of any sbc.Also if a guy is hellbent on a large journal 327 build and needs a crankshaft dont overlook the 307 as they have the same 3.25 stroke. 69-74. I used to get them given to me for free all the time! I started out collecting/ building/ selling 348- 409s as a teen in the 80s when nobody wanted them. Been in the game a long time craig with restoration work for both Henry Ford & Sloan museum so im not just another yahoo out there, when I give info it is sound proven and trusted! Keep up the great work.

[@gunnyman100]

I bought a 1963 327 to rebuild and put into my 62 short bed fleetside C10. Gonna be one helluva truck...

[@bryandouglass9997]

In highschool I built a 327 from a 4 bolt 350 block and a 307 crank witch is the same as a large journal 327. 327/350 cam, 327/300 intake with a 2in spacer. Went in my 70 malibu. Those were the days.

[@isaachuerta]

great video, awesome camera clarity.

[@offroadcanadian807]

Good information thanks I’ve got a 68 chevelle Malibu with a 327

[@georgespangler1517]

Great explanation of journal,, with marry go round,,,I have s 327 in my stash,,, going to check date

[@joepizzola9675]

got 67 el camino with 327 small jurnal getting ready to rebuild can't wait

[@jb314stl]

I loved the 400 I had. Vortec heads with steam holes drilled and an air gap intake. Never had problems overheating. I still regret selling it.

[@silicon212]

The journal size was increased in conjunction with nodular cast iron crankshafts. The small journal cranks are all forged and are stronger than the large journal cast cranks.

[@denismorissette419]

Oh that makes sense!! Bigger to compensate for a weaker material and also cheaper to produce.

[@yunggaucho3534]

So I just look for small journal crankshaft for my lt1

[@kungfuchristmas]

Correct. When you look at the crank the casting flash is about 1/2" wide

[@johntate4638]

Were the old 327s the same bore as a 350, but shorter stroke?

[@shitbox7413]

John Tate, Yes, all 327’s have a 4.00” bore and 3.25” stroke, only difference is journal size.

[@ziggassedup]

Cool chat about the small block.

[@stevew270]

Got a large journal 327 block out in my shed, I hope to build it some day.

[@thomassantiago814]

Thanks for the info...always great !!

[@chrishensley6745]

Love them early model 327,s man! 4-speed with right gears,Tough engines.

[@billp5656]

I had a 65 vette with a 327/350hp engine and it was awesome!

[@howabouthetruth2157]

Great information. Man, I love this channel.

[@Myvintageiron7512]

Thanks

[@hibanramirez3299]

Thank you so much for your information I have a 68 Camaro with a 327

[@ericjohnson8482]

We run 350's every Friday during race night at 8,000rpm, using standard mains and journal sizes, the valve train is more important at those speeds than the bottom end is. We had a small 400 in our 72 Caprice, it was a good little engine, in my opinion though it can't hold a candle to a 383, and they are so easy to make now and are cheap to build.

[@ocam988able]

I ran a large journal 327 for years in dirt track racing. Fast rpm out of the turns. Out ran many Pontiacs, Fords and Chevy 350s.

[@cushionface09]

You can also use a 307 crank with a 350 block to build a 327 large journal. But I 'm sure you know this but for some reason nobody talks about it. Keep up the great info.

[@leobav2425]

I remember my first oldsmobile that had a 455 cu in it. Gas prices back then was .87 cents a gallon.

[@pierrecomeau3737]

I have a 1967 C50 Chevrolet with a Chevrolet 4 speed, reverse to the left and to the seat. The engine is a '68 (I believe) 327 with the "two tall towers" heads and a Two-Jet Rochester carb and points distributor. Always wanted to bring this old truck back to life.

[@supersportimpalass]

Should have mentioned all the early small journal 327's had factory forged cranks. Later large journals were cast.

[@MasterWitchDoctor]

small journal 327 cranks were forged steel ;) and this 1965 Chevy II I bought has a factory 300 hp 327 in it. The blocks casting number is 3790721 and its a 2 bolt block. Im building it for NHRA Super Stock SS/I class with a 4 speed. NASCAR engines use the 400 bore (4.125 inches) and the 302 crank (3 inch stroke) because they rev out to 9,000 - 10,000 rpm and stay together. Im not a fan of 400s and these long stroke small blocks. Ive burned more 383s and 400s with a 283 or 327 than I can remember. A 350 and 383 are good street engines but the shorter stroke engines rev faster and higher and are much better for racing purposes. I love your videos BTW!!!

[@MikeL-vu7jo]

thanks you have answered a lot of questions

[@fleetwin1]

very interesting, so much to know....I wonder how many builders have been fooled by the journal differences...

[@bigpaw64]

hi - love the vids buddy.i have about 50 steel cranks for sj 327 as well as lj 327s. i hear the large journal ones are getting very hard to find. in addition i have many steel cranks for 283s and 302s. i also have a few bb chevy steel cranks for the 396/427 engines with cross drilling. if you ever need any of these i will sell them on the cheap. i have what i need and theres plenty extra. keep up the good work and i will keep enjoying the vids. take care Don

[@BM011]

Great information. thank you Myvintageiron7512. Ive learned a thoughtfully built small journal Chevy 327 engine can rev to 7500+ RPM (just over 4000fpm) and make potentially around 500+ hp or 1.5 hp/ci., a 6" rod 327 will have a 1.84 rod ratio and much less side loading of cylinders than a 5.7 rod 350 or 383, allowing more rpm. a 383 stroker with 5.7" rods has a 1.52 rod ratio. Im currently (jan. 2020) re-building the original 67' small journal 327 (3892657 casting#) for my 67' Camaro featuring some special parts like AFR cylinder heads, ISKY hydra. roller valvetrain, custom 4032 Auto Tec 10.5 comp pistons, thin ring pkg., 6" SCAT rods, GM forged steel crank (GM P/N 3782680). Should be a good experiment, i had a 383 3.75 stroke engine for 20 years, looking forward to much more RPM.

[@DeliriumElectric]

Oh sounds great. Did you ever get that combo on the dyno?

[@BM011]

I didn’t get it on the engine Dino but it is in the car (67 Camaro T56/3.55 gear)running very strong it pulls hard to about 7200 RPM that’s where I shift(1st gear), I’d say the combination is probably good for about 500 hp at 7000 RPM I’m planning on getting on a hub dyno soon, i’ve been having issues with mechanical fuel pumps lately, but it is an awesome combination.

[@hydroy1]

I have a 1970 Chevelle 4dr. daily driver with a 307 , I am building a 66, 327 Small journal .030 over flat top pistons molly rings Comp hi energy cam with pretty much stock specks on 110 degree center lime for a wide power ban for a 700R4 auto trans. Will be using 882 casting heads and a factory aluminum intake and Q jet carb. I will be adding block huger tube headers and I am hoping this combo will give me good mileage & pull a good sized trailer with out issues in the Chevelle. And yes

[@kinsheffield6218]

Love your channel. You have great insight especially for the amature like myself. currently building my first motor from the ground up 400sbc. done the top end several times but this will be my first bottom end. I've watched your videos and tought myself some very basic for you but nessecarry steps. just want too thank you for your channel and dedication too education people on the inns and outs of engine building. do you have a contact for details questions?

[@69dodgecharger440]

Finally it’s clear on 327’s! Hope you can do a thing on 400’s destroked to 377 or a 350 stroked to 383! The advantages or disadvantages of these two combos! Thanks great viewing! New follower after the 305 one! Awesome 😎

[@kennywhiddon1497]

If you have a 400 use it along with some good heads, they make a lot of torque and don't need to be turned up any more than 6000 rpm, they make great street or baraket engines, by the way, use 6 inch rods in it.

[@nkcwilliams]

Great videos....Lets see a 283 build.

[@brettkelly4575]

267 build lol

[@purebredamericanmutt]

My brother bought a 350 from a engine shop I have a 1984 El Camino with a 283 L79 cam and he backs in next to me and pops the hood look my 350 I look at it and it has the vent in the back. I said no you have a 283/327. He traded for a 350 for his 71 RS and I get a 1967 Corvette 327 with a L79 in my El Camino now. 700r4 3:73 posi carbon fiber = fun ride

[@larryreagan6936]

Awesome videos man I like the way you keep it clean! One thing I would like to point out is the 302 sbc shared the same crankshaft as the 283 sbc I used to de stroke 305 Chevy engines that would rev quick and high using the large journal 68-69 283/302 cranks, noted they were smaller bore than the 283's which gave less cubic inches so it made for a lighter top end weight, I had to use a different connecting rod length though because the pistons set low in the bore, I used 305 truck pistons and 62-64 cc heads because the 58cc heads didn't flow enough air when you revved it up high, I did it on a whim just playing with parts to see how it would run, I have to say I was impressed with them! I've since moved on to Pontiac engines and I am very satisfied now, but those were some low budget days filled with good memories and friends that I'll never forget! keep the videos coming and I'll keep watching!

[@adenkaiser399]

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[@lanezaiden7192]

@Aden Kaiser instablaster :)

[@adenkaiser399]

@Lane Zaiden Thanks for your reply. I found the site through google and Im in the hacking process now. Looks like it's gonna take quite some time so I will get back to you later when my account password hopefully is recovered.

[@adenkaiser399]

@Lane Zaiden WTF IT ACTUALLY WORKED :O I just got access to my ig password after about 30 minutes by using the site. Just had to pay 15 bucks but for sure worth it :O Thank you so much you saved my account :D

[@lanezaiden7192]

@Aden Kaiser happy to help :)

[@rhettwagner6002]

I love your videos! I appreciate your knowledge! Keep it up

[@rickstanfield1686]

I put a 265 crank and rods in a 327 .. it melted somewhere around 10 grand, got a custom hood for my next nova though ..

[@jimburig7064]

So you had 301.88 cubic inches AKA as a 302, like the real Z/28.

[@georgespangler1517]

I have 2 400 engines,,,but I heard about the overheat issues,, and never used them,,but I knew they would be valuable, because so few

[@mrrich1966]

I'd definitely appreciate an in depth video on the 400, I had one in my pickup and it was a beast. still have the engine and plan on rebuilding it soon. I've heard about overheating issues though I never had that problem. I've heard the cylinder walls are thin due to the large bore and I've heard they have extra water ports but it would sure be nice to clear up the patch work of Info

[@trillrifaxegrindor4411]

400s have siamesed bores and steam holes in the heads,anything else?

[@seanclark5524]

The cylinder walls arent thin, its just that they are siamesed, so they dont provide as much surface area to the cooling water. Smokey yunick did a good job explaining the differences and what they mean regarding cooling and bore concentricity as the engine heats up.

[@jb-ik8sj]

Good info. I recently purchased a YW 327 that the seller claimed came out of a vette. WRONG! It was more than likely pulled from a school bus. Small journal mains with 1.72 intake valve's. And my machinist is trying to sell me a 350 stating the parts are cheaper. I think now ill keep the 327. Thanks.👍

[@antonleimbach648]

I had a 67’ firebird with the 326 and the Power Glide. Loved that car....... That 2 speed was awesome and great for light to light racing.

[@blakake]

326?

[@stevenmarcinkowski8577]

Ran across an old 327 in a junked Chevy school bus 65 back in the 70's

[@normhodgkinson6965]

1967 Camaros had a 350 available in the SS model. It was rated at 290 HP.

[@uhfnutbar1]

by the way AMC/rambler made a 327 first and was kind of as hot rod motor for it day.. 327s installed in the 1957 Nash Ambassador and Hudson Hornet models in that it uses mechanical valve lifters and a higher compression ratio. Since both engines were rated at 255 hp (190 kW; 259 PS), it is probable that the Rebel's was underrated

[@toddjensen692]

There was a main journal shim kit that would fill the space between the small journal bearing and the large journal main saddle.

[@JorgePerez-ss7ee]

Thanks for the leason!!!

[@joeblack6249]

I have a block and heads cast in mexico and accorging to what i found it was cast in 1988 and yet its a 2piece rear main and has the same lifter valley as 305 roller engine has the bosses for the roller setup its different than any ive seen but i think its very well cast and is potentially better thanthe post or pre 86 american cast blocks

[@racer67]

Great video! I have a 67 impala with the original 327 in it.

[@loganturtlemen5779]

Speed Racer Same here, is yours a project car too?

[@patw52pb1]

Good info. The 67 302 was produced with a small journal crank with a 2.300/2.000 main/rod journal diameter with a 3.000 stroke and a 4.000 bore. The 67 302 cranks were basically 283 units and the blocks were small journal 327 units. That changed in 68 and 69 which were large journal cranks and blocks. Also some performance bearing manufacturers produce special bearings/spacers that allow a small journal crank to be used in a large journal block. The smaller diameter journals lower the bearing surface speed, reduce frictional loss and lower oil temps in high RPM operation.

[@Myvintageiron7512]

Yep you are correct on all points

[@w41duvernay]

So what makes more power? the 350 or the 327 small journal/large journal ?

[@windellpenton]

w41duvernay depends on heads ... compression etc.. all else equal, the 350.. more displacement..

[@gregg4164]

So basically then you could create a hybrid SJ 327 with a standard 350 block and get all the benefits of an SJ with high RPM ranges. Interesting.

[@jeffnorbert1871]

Perfect explaination!

[@jsteganius6969]

Yes. Agreed. Perfect explanation!!!

[@gregorylopez3155]

Thanks for that info sure appreciate it

[@georgehoy5144]

I understand that there is a bearing kit available to run small journal crank in a large journal block. I have a Std forged 327- 365HP crank and rods that I am considering to build using a 350 block.

[@Morgow1]

I learned something new today!

[@stevew270]

You can learn a TON of good things watching this guy, he definitely knows his stuff!

[@timedmonds3]

Found a 1967 Nova SS 327 2 speed in a 1929 barn, bone stock rightdown to 595 cfm carb. 94mph in first gear @ 7000rpm (bent a push rod one a run) 0-60 6 secs all day. top speed 141mph.

[@normhodgkinson6965]

141 mph ? with a speedometer that only goes to 120 ? Wow !

[@lynndragoman1573]

That sounds good but they went larger diameter for the crankshaft overlap. The 302 could be made by putting a 283 crank in an early 327 block but the cranks would crack under extended 8000 rpm road racing stress. If you go 2.100 on the rods and 2.450 on the mains the overlap is substantially better same as the 400 versus the 350

[@peterluta1119]

great job sir

[@rotory2002]

I feel good owning 3 400 blocks with heads (steam hole) and 2 283 blocks and 2 327 blocks and a bunch of various 350's :)

[@johnrunion8309]

There is 2 327 blocks in 1968 , 512 casting 350 hp small crank . The other 678 casting 275 hp same block for a1968 Z28 302 290hp . Big crank . I them all in my shop im

[@mark4m557]

I want to build a 327 SBC for my dirt modified. With our open engine rules the maximum displacement is 362 for a SBC, and you can’t stroke or de-stroke your engine, but you can run 327, 305, or 283, as long as the parts match. I know there’s guys who run those shorter strokes engines, and turn 10,000RPM.

[@MrOregonite]

You forgot to mention the stock 327 piston has a different pin height. Good video

[@Myvintageiron7512]

yes that is true it uses the same connecting rod as a 350 5.700 with a 3.250 stroke in order to get the piston close to the deck surface it has more piston pin compression height in other words the pin bore is lower on the piston that the 350 piston this is also how most 383 pistons are as well excetp in the case of the 383 the piston pin compression height is higher the pin is raised very close to the oil ring groove and the piston is shorter you just gave me a great idea for a video Thanks

[@kennethcohagen3539]

When Chevy brought out the 350, 4" bore by 3.48" stroke compared to the 327's 3.25" stroke, there was a lot of discussion over which was the better engine. In several build offs done by Hot Rod, Car Craft and Hot Rodding magazines showed that the 327's actually made more horsepower than the 350 did. There are a couple reasons for this. First is Rod length to Stroke ratio, in which the 327 has the advantage. Second is that at the time rpm in a small block was everything, and the 327 would spin higher than a 350. Also the 350 was kept over the 327 was because of Chevy wanting to keep as much power as possible and with the EPA cracking down on them more cubic inches was deemed the way to keep as much horsepower as possible.

[@Myvintageiron7512]

Yea it's a shame the 327 went away after such a short time it really was a great engine

[@brandonpriest3604]

Great video

[@frostybud6217]

Ive got a vette 327 sitting under the hood of a 1968 c20. Im currently building a 350 for my 1969 c20

[@ucallthatatweet]

Are those thick bearings I hear about a good way to get the small journal crankshafts to work with larger parts?

[@christianwise4403]

In 67-68 they introduced the 350 307 and 302 the 302 was large journal and tach was 10,000 rpm I know the theory for large vs small journal n higher rpm but the large journal very capable also. Fun fact 302 327 350 all 4” bore large journal pretty much same block. 307 took over as small displacement v8 in chevys ending the 327 with 307 and 350 but your correct large journal 327 ran 68-69 I had a 69 impala that was wrecked I pulled the 327 for my 68 chevelle 👍 with 4.11 gears ram down highway for hours at 4,000 rpm was a great little performance engine

[@clintonsmith9931]

Had 65 Chevy ll with 300 hp 327 Straight from factory Always felt 327 was faster than 350s The ones I built ran like crazy Early 350 seemed sluggish to me Had 60 over 327 with 13to 1 pistons in my 36 Ford Those were the days

[@michaelteeple8704]

L79 was the king 327 but in mid 60s the heads with double hump on front usually meant factory 300 HP. And they rev nice and quick. If i remember correct factory numbers were 365 on L79.

[@danielmccoy8875]

The L79 in stock form was the 327 350 horse motor the 365 horse motors used the Duntov camshaft if I recall

[@johnthonig8832]

@@danielmccoy8875 Correct L76 is 327-365 in Corvettes I have a 65 Vette L79 327-350 L84 was the Fuelie 327 L75 was 327-300 Base model was 327-250

[@itsjustnopinionok]

Way back in the mid 1980's. When i was a teen and into chevy engine. I went to a old timey car garage out in the country side. Talking engines with a old machanic. He told me that some 327's could run high rpms. And that racers like them. He was saying 8,9 and even 10,000 rpms in some cases. I was saying to myself. No way. But today i want to find that guy and say. You know your stuff.

[@gabrielbryant811]

I was wondering if the aluminium 350 from the camaros would be good to build or would it not hold up as good as a cast iron block?

[@denn606]

Back in the day, all my buddy's built 283s because they were rev monsters, 8000-9000 grand no problem. I chose small jornal 327 because I wanted a few more cubic inches but still twisted up. I tore down a 283 from them one time and found one rod twisted sideways slightly and bent to the side near wrist pin but still ran good?!?!

[@beestoe993]

During the 60's the muscle car wars hit its zenith and 327's were done right. Even the stock, low power motors had heads with good compression. The Camel hump heads were excellent performance heads. But shortly after the introduction of the 350 GM started de-rating motors because of pressure from legislators and insurance company's. They were coming out with stuff like the notoriously bad "smog heads" with low compression. Some people even figured out that they could improve their Camaro with stock 327 heads. That is the biggest reason why the 327 got a reputation for being superior to the 350. Given similar components they are actually very comparable. They just shine at different power bands.

[@kennethtaylor2444]

Thank you for ALL OF THE INFO in this video. I recently was given a 327 that was left for dead in a yard. I was told that she knew nothing about it and I could have it for just hauling it off. I'm confused by a lot of its components. The block stamping has TII29R stamped on the pad and the casting number is 3782870 on it. I believe that means it was built Nov 29,1962 for a full size car with a manual transmission. The crank has a 030R/010M stamped on it along with notches ground out of the front lobe(balanced???).The heads are the Power Pack (3795896) heads. I'm trying to decide whether or not to rebuild it. Any input on whether my son and I should rebuild it to put in the 69 nova that I also removed from the yard. The nova doesn't have a title so it would be a track car only.

[@burnychaplin4601]

I sold a fresh Forged flat top small journal 327 with a 010. 010 crankshaft New bearings Cam bearings and freeze plugs file fit rings small 488 lift. 302 duration solid cam complete shortblock new balancer included for 850 dollars didn't even get my parts money back got tired of seeing it set in corner of garage taped up in black trash bag don't know why I didn't keep it it wasn't costing a nickel setting there was 64 car block according to numbers. You have alot of knowledge about building engines you must do it for a living

[@dehoedisc7247]

Good vid. Did you consider the 307 for the purpose of comparison to the 283, 302, 305, 350, 400?

[@edmoulton6066]

hi i have a 67 gmc 327 and was going to put the 400 heads 882 or take my stock 174 valve heads and replace with 194 i guess i would have to put hardened seats in the older heads as well.

[@frugalsolutions]

Do you think a 327 should be used in a 66 c10 longbed with 373 gears if I just plan to use to tow a boat every now and then? I already have a rebuildable small journal 327 and thinking about rebuilding it? The machine shop said I should go the crate 350 route since it has more torque for towing, but I thought some c10 came with 327's.

[@markwallace5274]

Thanks for your reply on the Topic I’ve always heard this as well and seen it with a 400 personally does drilling the steam holes into the cylinder heads help relieve this issue at all I don’t know of any aftermarket heads that came with them ? Or is it more to do with the Siamese bores ? Love the videos it nice to see someone who actually knows what they are talking about to share knowledge and experience.

[@Myvintageiron7512]

Thanks, Yeah you halfto drill the steam holes

[@markusgentry1548]

we never have drilled them n have yet to have problems

[@jrsgarage3244]

Less reciprocating weight , rotating assembly lighter revs faster 🏁👍