Sounds like you are on the right track.
Gauges first. Fuel pressure is VERY inportant in that truck. Autometer here, but would also consider other flavors depending on personal preference. Gottem from Rip.
Exhaust from Rip.
Intake is Scotty II now, but could just as well be AFE Mega Cannon. I prefer oiled fiber element filtration. Also from Rip.
Detecting a pattern here? ;p
RIP
Auto or Std, it will probably live with an Edge EZ box, or equivalent, depending on driving habits. Any more power upgrades, and he will need to throw down for a clutch/auto tranny upgrade.
Welcome to the forums.