I assumed you already had the setup your asking about since it's in your sig. If you are still in the shopping stage, it would probably be good if you listed how you use the truck and what your hoping to accomplish with it. It's so much cheaper to get what your after the first time around.
If you haven't made your mind up on which injectors to go with, i firmly believe the f1 "mach" series that Don M makes are the best available.
As for your original question, i guess hp depends a lot more on the individual truck then i thought.
I did 408hp at muncie in 03 with nothing but dd2's, an edge comp and an afe intake. (yup stock exhaust with muffler and hy35, stock fuel system, etc. )
A while later at kauffmans i made 415 with the addition of a 4" exhaust.
With an hx40, fass and going from a standard comp to a drag comp i made 454 (or 464, i need to check the dyno sheet) on DD2's.
Injector only numbers witht the HY35 and stock exhaust were 268 and with the hx40 about a year later i made 272hp.
Chris