ARP head studs, have your crank micro polished, and pistons and rods balanced and blueprinted. And since you got your motor in pieces, lighter forged rods are always good insurance on a built motor, but all this is jus my 2 cents
So he's going to put forged high comp or low comp in? If you change apps you change pistons. That's why I recommended the rs because they're good and cheap to replace.