I may be trading my 97 7.3 for a 2005 6.0 ZF6. With that said, while I know a decent amount about the 7.3, I know nothing about the 6.0. The guy says the motor runs fine and it has a new trans and clutch with paperwork, as well as 4 new injectors. He deleted the egr, put new headstuds and head gaskets in and he replaced the water pump. I know there is a huge list of parts that can be associated with bulletproofing the 6.0. If I just wanted to keep the power level stock or maybe even run a mild tune, what other parts would be necessities to upgrade to make the engine "more-bullet-proof"?