poorboy44 said:so was this problem only with the 12.5:1 pistons or was it all 87mm cp's. Because I have a set of 87mm 11.5:1 pistons and I wanna make sure evrything is cool
dude read ! its the blocks and your bore size,its any std size piston!A std size piston is meant for a perfect/new block.If you have to hone the shit out of it it wont work,if you have a motor with high miles it wont work.You should never order a std size piston until you measure your bore first! If you want to be safe and order pistons before you open your motor go over sized and have it bored.You shouldnt be building motors if you dont have the correct measuring equipment!! And i dont care what machine shop you go to alway check over there work!!!