I tried using one of there duel row bearing carriers and it went bad really fast. I would be really skeptical about running one of there engine parts. You can just bore out your stock jug to a 416 and do gt thunder hd head studs and be just fine. Take all of your parts to a competent engine machine shop. If they dont ask for this piston to do the bore then turn and run. They dont know what they are doing. My .02