My many years ago limited experience. work on the oil system. make sure it oils the bottom end. build it for torque, If you expect to turn it out of the frame you have the wrong engine. Crane does cams on an order only basis, They will build you a torque cam. Clean up the ports on the heads and intake. Offy makes 2x4 and 3x2 intakes. If you are wanting max performance build a 6.0 LS.