[HemmiGremmie]

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

[BOBCRMAN@aol.com]

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

[406 ss monte]

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.

[HemmiGremmie]

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

[rifraf]

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

[HemmiGremmie]

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

[377_monte]

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

[406 ss monte]

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.

[machine shop tom]

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.

[Cstraub]

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

Cstraub

[rifraf]

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.

[hondaplace]

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.:

[GoneNova/406]

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.

[figure8]

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.

[LilSmoke]

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.