Bigchief, engine looks nice!! what cam did you go with. cant wait to hear how it runs. keep us posted. Bluebird428, the sealed power pistons have 4 relief valves and are listed as 6-7cc. thanks for the reply. im having a heart to heart with the machinist today so if I find out any more words of wisdom ill be sure and share it. Firebob, thanks for the advice. much appreciated.