coyote42
Well-Known Member
Looking for advice on what the highest compression ratio I can run on 92octane pump gas. I dont want to deal with eng ping and dont want to go too high. Im building a 68 340ci with cast iron X heads, Around a 268 cam. I want to true deck the block and heads and need to pick the right piston height. Whats the average CC of an X head chamber?:banghead: