Haven't built one before. Would like advice on engine kits, whether I need a PS rod for 6-8 psi factory style turbo and things near/related to. Just want put something decent/stout together for my father who tows a 5th wheel, rock, dirt etc up the mountain at 4ft elev. Mahl pistons vs others? Head gasket? If I use PS rods, which balancer and flywheel should I buy and send out with the rotating assembly for balance? Heads, some better than others? Porting ,I have a flow bench ...but should I bother? Something about 1/8 vs 1/4 oil feed to the turbo or injecter..? I'm new to these...so while I've read some things, I'd really appreciate some help from more experienced 7.3 builders. Thank you in advance.