so i am trying to clean up my tune a little bit in hopes of a cleaner burning and faster truck in level 6 on my juice with attitude...i dont neccesarrily want to make my truck a race car, so i dont really feel like droppin all that money in a lift pump unless i absolutely have to, so my question is: what would be the most practical and efficient way to go about doing this?

shim kit?
Race valve?
ported fuel fitting?

ps. i also have a ppe boost controller on the way and im hoping that will help a little.

i've also never thrown the low fuel pressure code, it just seems like its smokin like a train but not goin newhere at WOT in level 6 and i would like to change that