Well i guess we are in the 24v forum so i would first definately start out with guages, check your fuel pressure, get a carter pusher pump and put it inline right next to the tank. then get a fueling box/ timing box. Depending on what you are wanting to do with your truck then that decides what box to get. If you want rpm then go with the redline box from blue chip. If you want a awesome all around box fueling and timing then go with the edge comp. Then a set of injectors small good set would be the rv275's if you are wanting lots of horse power go with a good set of injectors. If you want lots of hp then call JR at Adkins diesel performane he can help you set up your truck. He mostly only builds big injectors and stuff. Then you are going to need a turbo and JR is definately your man there.
For a fueling or timing box call Bill at BRC diesel he has the absolute best prices on guages, fueling or timing boxes and air intakes.
Both of those guys can help you out a lot and their prices are more than competitive.
Their numbers are in my signature above.
Chris