hey, can anyone tell me ,if a stock 350 engine block is bored out .30 over to a 355 c.i. ,what piston size[ratio] would be in the block.


thanks,sasquatch58

What do you mean by ratio? You talkin compression ratio? Anyways, a stock 350 has a 4 inch bore, so if its bored .030 over, it will have 4.03 pistons in it. As for compression, it could be anything. You can get a .030 over piston in any configuration(big dish, big dome, flat top.....), and of course the combustion chamber size in the heads dictates compression as well. In other words, the same piston can make many different compression ratio's depending on what the combustion chamber size is in the heads used.