Steel crank, eagle rods, ross pistons, 6.1L lifters, adjustable pushrods set for .030 preload. The only thing I wory about are the rockers. I had them cryo treated and I can't afford the Arrington rockers yet. When I get them I will throw some more lift in a new cam. Only running around .530 lift and would like to be around .650 After I do that, goodby 11s 10s here I come!!!