So I have a stock 350 out of a tow truck (or so I was told) but I'm curious as to what the compression ratio would be with 64cc heads (083 casting) and the stock rotating assembly, the piston appears to have a fairly shallow dish, 4 valve reliefs, and something like a chamfer before the rings, I was lookin at 10:1 pistons, but if I could pull off 9.5:1 id be happy, I'm only lookin to get 350-400 hp out of it. I will be doin a little bowl blending and maybe some gasket matching, lookin to run a cam with no more than. 510 lift and roller tip stamped steel rockers, also a 650 holley carb with a dual plane intake., I've done a little lookin on google and can't find what I'm lookin for, any info would be appreciated.

 

Without a accurate piston cc measurement would only be guessing.
Couple of cc difference in cylinder makes a lot of difference to static CR

 

A guesstimate would be fine, it don't have to be spot on, I'm just lookin to do a budget build and I could save money using what's there