I bought a 2004 f250 and am doing head gaskets and studs on it they just came in mail, I'm doing new oil cooler , it has new all metal hpop I did blue spring fuel reg kit. My question is I wanna make the high pressure oil system long lasting . What exactly do I need toget I already have updated pump, do I need stc update, and o rings for stand tubes? I read about a after market seals or fitting or somthing ? Any recommendations?