Man,, theres a alot of quitters on here with to much money, Pull it apart dingle hone it feel for indents and imperfections that can catch your finger nail. If they catch your nail bore it and smack.new pistons in the hole and run it. I built a 360 that was in my eyes no way.it was gonna work and 4 years later still gettin the dog beat out of her shes got blow by but.wow tbat engine gets beat