377 stroker question?

Hey all.
I have a chance to buy a 400 block, fully machined for 325 bucks. If I get it. I may destroke it to 377ci. Ive had one of these before and loved the way it reved, but I cant remember if you use some kind of spacers on the 350 crank, or if the crank must be machined to use in the 400??? Anyone know? Tnx, HG


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You can use bearing spacers(cheaper in the long run) or the thicker adapter bearings.

you can get a after market 3.48" (350) stroke crank with the big 400 mains. you can find them for around $300.00. i seen one the other day that was forged 5140 steel for (i think) $289.00. that would be the best way to go if you want to build some horse power & turn it 8500 rpm.

I have a steel 350 crank already, so I will probably use that. HG

Not to but in but where did you see it,sounds cool,I always liked that combo but was leary of the bearings.

I had a mild 377 in my prostreet Chevelle, but I never built it, so I dont know exactly how it was put together with the crank.
It was a fast reving, quick running motor. It was fairly mild built, but held its own to some beefier engines. Cant imagine one in a light car thats built up. HG

i got one in my 84 monte and it's not a real heavy car...i love the way it winds up, but its all top end really. i had to put a 4:56 gear in a swapped in axle to get it to launch but when i hit 2nd, it feels like i hit the turbo button we all loved on video games..
anyways i bought the 377 crank, just thought it seemed more logical and i have a true roller setup(cam lifters rockers) with a dui ignition and pete jackson gear drive(love the sound)
a put alot of $ into it but in the long run it was worth it i get just shy of 500 ponies with the tunel ram setup but the carbs like to get out of adjustment, it's a blast to drive but the cops around here dont like it when i un cap the headers..lol (do they anywhere) all in all theses motors are worth the time and money to build.. just my 2 cents worth

go to ebay & check out these two item #'s. 2454096871 & 2455317526 these are great cranks for the money. i tried to put in the links but it wouldn't do them.

Athough the crank spacers are kind of cheesy looking, they seem to work okay. I've seen a few of these engines last a long time with the spacers, so going that way with your 350 crank should work out well. They are a lot less expensive than the purpose-made bearings.

CC 5620 is the part number from Comp. They work very well for engines under 700HP.

Cstraub

Ive actually put them together for other people,but for my own motor,I know. The one guy ran the u-no-what out of it and it held together,so I guess they aren't too bad,it must be my old DON'T run a bearing thicker than you have to mentality.

My uncle has a 35 Chevy standard coupe with a 400ci with a 350 crank and Predator carburetors feeding this killer, the pistons are so dam domed it pings on 91 so bad he supplies the motor with Aviation gas, the lower side I think it is 103 octane but this is the freaking best and the funniest V8 motor I have herd. He his rev limit is 8200 . I just had to right to this post because I saw 377 and I love that motor.:

if you guys like the 377 motor you should do your self a favor and go to afr heads.com,click on articles and go the the article "the 350 chevy should have built".its about a 400 motor with a 327 cranck the rods are from a 300c.i.ford six cylinder and nearly 6.5" long.check it out and start dreaming of the possibilies.i'm pretty sure almost anyone would love this motor.

I have a 377 in one of my figure 8 race cars and I like it a lot. I use the bearing spacers and they work fine. You can get an aftermarket crank with the 350 stroke and 400 main size, but the bigger mains may have more friction. I have never tried one of these. 400 blocks are getting scarce around Iowa where I live but if I can find one I probably would build another 377.

Several yrs ago, I built a 377 for an altered. It wasnt anything special as it had dart 2s and about 13.2 comp. It was injected on alc with a 4.10 and a 33 in tire. Real easy on parts and ran 8.70s at 4500 da. So i really like em!,but the 388 is a little more powerful.