364 bore question

i called this guru on 58 Buicks and he said that you can bore a 364 to a 425 CI. If i did that would it be any advantage to bore the valves seats, etc to fit it. and putting 425 pistons in there would increase compression to 10:1 from 9.5:1. I am finding that supercharger wont work because i dont want to cut up the hood, they dont make turbos that will work, so boring the 364 to a 425 would also increase RPM wrap wouldnt it? I also want to put a dual 4 barrel intake on her. What kind of HP and torque would i get by boring it to a 425 and dual 4 intake?

 

factory bore for a 364 is 4.125 and a 425 is 4.313. this is a difference of .188" which is huge for an overbore.

before you try something like this, pay the ~$50 and have the block sonochecked for cylinder wall thickness.

if possible, this would give you a displacement of 349.31ci

 

The 364 has a 3.39" stroke while the 401/425 have a 3.64" stroke. It would take more then .188 to get to 425 CI with the shorter stroke of the 364. The 364 might take 401 pistons as that would only be a .062" overbore, but that would not make it more then 10 CI difference.

Cheryl

 

1st. Impossible. 2nd. find a 401, bolt-in.

 

holy brain fart Batman!

4.313 x 3.390 is 396.22ci NOT 349ci



i lost track scrolling back and forth on my spreadsheet or something...

 

Tom

do you have deck heights for the various Nailheads?

 

sure they do, you just have to get the right size ones and do a TON of fabrication yourself, or pay out the nose for someone else to fab it up for youou:

wes

 

I agree with Tom T. Why do all thise ''tricks'' when you can just bolt in a 401 or 425 and be far better off. It will require a little machine work, but not near what the other route will require.

 

Can you destroke a 455 crank with a shorter rod to get around a 364 cubic inch using the 455 block. Or what options can you do?

 

No you cannot destroke a 455 that much.... if you could nothing in the car would fit... the trans/flexplate, mounts... exhaust manifolds,, brackets/pulleys/belts..... radiator/fan/air cleaner.....
like we said ,,, far easier and less expensive to put in a 364/401/425.... and everything would bolt up and be reliable.....

 

A 401/425 "Nail" crank can be used in a 455. Bobb Makley has done it to get, I think he goal was, about 8000RPM's in a blown engine he was running.

 

Can you destroke a 455 crank with a shorter rod

Longer rod