What is a Chevy 350 engine bored 030 over called?
What is a Chevy 350 engine bored 030 over called? (Chevy rounded it up to 350) Your engine which has the same stroke of 3.48 but now is bored .030" over (making the cylinder bored size now 4.030) total size of 355.1 cubic inches or just a 355. Wiki User ∙ 2013-07-04 23:28:34 How big is a maxium overbore on a 350 SBC? .060 on a pre '87 GM block is about the limit. I believe aftermarket blocks can take more. I think -- I think somebody sell's .080" over 350 pistons so go from there. I sure wouldn't order...