Again, read the add.... I have not had my hands in this engine it was on the boat when purchased. I pulled the heads because I could tell the engine had been apart and wanted to a least get some info on the top end and saw that there were"5" newer pistons. "4" std. and"1" being .030 over. That would leave "1" piston being the hurt one a stock piston. For not pissing on my add, I think you have done a great job of it.!!!