The sleeves are darton and the pistons are je 81mm... Alpha,thanks for the sweet street tune and the post..you really did me right..I also have to thank Mike Yonkie for all the help and input on the build,Mike you the man...thanks to tayler for the words of wisdom and advice..Thanks to John at LHT for the killer job and price on the cyl.head work...And thanks to everyone else that i bugged the hell out of with questions and phone calls..You all made this work and so far it has been everything i hoped for.Thanks everyone.