im doing the rebuild regaurdless it burns oil and smokes like crazy. the reason for my question about the pistons is so if i get a wild hair down the road to do more i wont be limited due to crap pistions but you guys made it clear that they are good stock and i thank you guys for pointing that out.. and i called around and a used SC short block is worth its weight in gold around here so thats out of the question everyone up here is real greedy