Chevy 327 Breakdown

[@incompetentobjectivist3850]

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

[@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.

[@zmxl1020]

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

[@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.

[@screamotraplord]

So I just look for small journal crankshaft for my lt1

[@kungfwooxmas]

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.

[@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.

[@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

[@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

[@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.

[@JuanLopez-zf8zb]

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

[@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

[@River-Banks-p2p]

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

[@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.

[@Sellstufr]

I heard some say only the 350 and 365 horse small journals were forged cranks. I have a 65 300hp 327. It's already 30 over but worn. If it really has a forged crank I would like to bore it 40 over if possible and keep the engine . I already have brodix ik180s , performer and a holly 600 do on it. Only need better rods I'm guessing to push a 7k redline with a bigger cam. Have to old 30 30 gm cam in it now

[@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

[@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.

[@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'.

[@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.

[@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.

[@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

[@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.

[@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

[@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.

[@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

[@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...

[@offroadcanadian552]

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

[@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.

[@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.

[@joepizzola9675]

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

[@kenswitzer4133]

I love my small journal👍🇺🇸🤙

[@nkcwilliams]

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

[@brettkelly4575]

267 build lol

[@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.

[@gunnyman100]

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

[@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.

[@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]

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[@adenkaiser399]

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[@lanezaiden7192]

@Aden Kaiser happy to help :)

[@ziggassedup]

Cool chat about the small block.

[@stevenmarcinkowski8577]

Great info. Grew up on small block Chevys

[@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.

[@NaturesChild]

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

[@isaachuerta]

great video, awesome camera clarity.

[@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

[@leobav2425]

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

[@ivanbadillo4909]

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

[@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.

[@supersportimpalass]

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

[@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

[@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

[@billp5656]

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

[@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.

[@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

[@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!!!

[@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

[@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.

[@Schlipperschlopper]

Unfortunately, the Federal Exhaust Gas Fun Ban Ordinance (BABVVO) and Transport Tourism Emission Restriction Federal Ordinance (TEBBVO) will soon ban driving combustion engines in public outside of proven commuter trips and transport trips, because then exhaust gas fun WILL be a traffic offense!!!!!! Furthermore, a vehicle tax of 30,000 euros for exhaust gas-emitting combustion engines was threatened!!!

[@jackassman6726]

Can You do a Video on the L79 327/350 Hp,,, I had one back in the day and thought it was a Great engine...!!!!!

[@oldgriz816]

Jack Assman , that's the engine I had in a 73 Vega.......fun shit.

[@MasterWitchDoctor]

@@oldgriz816 I bet it was fast as hell.

[@georgespangler1517]

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

[@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.

[@normhodgkinson6965]

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

[@toddjensen692]

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

[@jimbernitt7590]

Hi... i have watched alot of your vid.s.... i really liked this 327.. one.....i.ve seen many times... it answers the hard to see questions.. the only question i can come...up with... is.. the journal size.. for camero...ss ...350 of the year... 1967.. is that..one still small jrnl...i also really... liked the 396...vid... and the monster.. v...6... 305 c..i..d.. have a great week...end...

[@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.

[@howabouthetruth2157]

Great information. Man, I love this channel.

[@Myvintageiron7512]

Thanks

[@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 !

[@MUUKOW3]

​@@normhodgkinson6965You do know you can go faster than what the speedometer reads ?

[@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.

[@chrishensley6745]

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

[@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?

[@magform]

I seem to remember that the low compression 327/210HP engine used as the base V8 engine for the 1967 Camaro was the first Chevrolet engine to use the larger rod and main bearings. I also recall that the 1967 Camaro SS 350/295HP (and '67 Z28, 302) used the smaller main and rod bearings. It appears only the Camaro that used these three motors in 1967. One of the knocks I heard is that these motors did not have four bolt main bearings. From what I remember however that the performance 302/327/350 all had four bolt mains from 68 on. Your comments please sir.

[@Myvintageiron7512]

yes you have it right

[@silicon212]

No 327s were factory with a 4-bolt main cap config, but you can build a 4-bolt 327 with a 350 4-bolt block. The 350 was only available in the Z/28 in 1967. It was large journal. All other small blocks in 1967 had the small journal crank, including the Camaro engines (327).

[@ronaldprice9124]

I have a 69 327/210HP engine its supposed to be stock out of an impala. when I pulled the stock heads off all of the pistons were stamped 010 .. whats the deal, an old Chevy tech said it was a factory bore because it had a bad cylinder, what do you think ??

[@normbeck20]

I have a original 327/350h.p 1968 untouched 2 bolt main so I don't know about all of the highperformance engines being 4 bolt mine is not

[@normbeck20]

Gm tech says there was "never"a 327 4 bolt main ever produced from the factory no matter the h.p it doesn't exist

[@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?

[@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.

[@ice4278]

Will you do a video build on that 327 and tell the specs and hp i have the same one you are doing for your friend.

[@stevew270]

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

[@Sportsman883]

What do you think a safe rpm limit would be for a large journal cast crank 327 with cast pistons and a balanced rotating assembly, with x rods

[@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.

[@hibanramirez3299]

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

[@stevenmarcinkowski8577]

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

[@williamoleschoolarendt7016]

I have a 66ss Chevelle and I'm just about to drop a L79 sb 327 all the way down to the steel crank and I've added a set of Dart Motown heads CNC Ported victor jr intake ported a 750 turned into a 850 isck solid lift cam and Muncie 4sd with a 12 bolt posi with a Zoom clutch set up!!! The block had 21000 original miles so I didn't bore it and went with the stock 11to1 pistons and rods but I did change the rod bolts to ARP and the mains now have ARP studs with a windage tray!!!! I'm hoping for low 11s in the Quarter mile what do you think?

[@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.

[@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.👍

[@samohtnotslar]

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.

[@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

[@GregLove-b4s]

Had a small journal steel crank 327, tough high RPM motor.

[@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?!?!

[@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

[@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?

[@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

[@savagenomore]

I have a 327 block casting 3914678 and I don't know what to do with it (guy I got it from thought it was a 350) so looked the number up and I see they used these blocks for 302, 327 & 350 so I check the stamped code on the front and it comes back to 1968 327 from a Camaro, the cast date on the block is 11th month of 67 so would this be a 68 with the bigger journals? I would rather just use the parts I already have for a 350 if I can do that. Thanks

[@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

[@davidcoleman9304]

The 350 was introduced in 67. According to Motors Manual, and other sources, the 67 350 also had SMALL JOURNALS . Will that same size journal crank fit the same size 327? Making the older 327's a 350.

[@frostybud6217]

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

[@jeromeromanski3196]

I have a question I have a 69 327 in a 84 Pontiac trans-am that me and my father were doing for a project, he passed away 2 years ago so I'm finishing the car. My question is were these engines internally balanced or externally balanced? My engine has a vibration during acceleration and I was wondering if its possible to get rid of the vibration, maybe a fluid dampener or possibly another way. Thanks in advance

[@trillrifaxegrindor4411]

i think 0.100" is pretty negligible in a journal diameter difference.i would love to see the math done to compare the outer diameter journal rpm/speed with a 2" vs a 2.1" journal crank at 6000 rpm. it really cant be a whole lot different at the end of the day.

[@thomassantiago814]

Thanks for the info...always great !!

[@marccres6619]

I have both 2 bolt and 4 bolt main 400 ci sbc, and they are hard to find not destroyed.

[@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

[@murmullosBOMBUSKLAP]

Hi i have done a little change on my 327 small journal from 1962 i have in my impala The thing is i put in a comp cams kit 270h magnum and change stock quadralet intake to a airgap speedmaster with a edelbrock quadrajet carburator with a spacer 1inch it seems i lost a lot of power what do you think i whent wrong? Thankyou

[@dangerousfreedom4965]

So tell us about the 307

[@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

[@thomasbouyer8701]

HI. I'm the owner of a 1967 chevy chevelle 4 door hardtop with a 327 275HP motor in it and I have a question about gas. Here in France it is not possible to find leaded gas any more like in the USA I guess. So the question is : Do I have to put an aditive in the 98 gas I use in my chevelle to replace the unexisted lead or can I run the motor using the gas straight from the service station? Considering that I don't have the money to modifie the engine valve seats what would be the best solution of course. There're 2 schools here, some guy says "Oh, you can use the gas straight from the pump, you don't use your motor intensivly enough to do any damage to it". Some other guy says that you have to mix an aditive with the gas unless you are going to damage the valve seats. Anyway I use the aditive because I don't want to take the risk to damage my motor (they way more difficult to find here) but I'd like to have an objective awnser to that question. Thanks for your awnser. Thomas.

[@Myvintageiron7512]

Use the lead additive for sure! If you are driving easy it will help but either way with no lead eventually the seats will get damaged

[@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

[@pro8cess]

First off great informational videos and I'm happy to support! I had purchased a 73 k20 years back and was told it had a 67' 327 with 350 heads I still have not ran any numbers to check if it's a 327. As for what I got in your video only 68-69 327's were inter-changeable with 350ci and not pre 68 or is it just the internal block components for 68-69 327ci that are same as 350?

[@Myvintageiron7512]

The 68/69 blocks are the same as the 350 blocks pre 68 block is different smaller main bores

[@dondesnoo1771]

bought new 62chev 327 cu. conv. 300hp. never got beat except by j2 olds 57 .

[@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 :)