For your 7.3L, here is what I would do.
Amsoil BMK11 (single bypass filter, keeps the full flow in the stock location)
EaB100 filter
BK1102 Billet Oil Fill Cap
Get your oil supply from the oil pressure sending unit port and use the Billet oil fill cap to return the filtered oil to the crank case.
Much less expensive than most of the other kits out there, and its backed by a great name in the industry.