Chris,
For posterity sake, would you post up all the particulars on your rig?
'84 M1008 K30, 3" suspension lift 1" body (for fan clearance), 37" BFG Baja T/A military take-offs. 4.10's in the axles, Getrag/205.
Engine is 93 Cummins, intercooler from 94-02 Dodge mounted upside down (fits very well around GM radiator).
It started out bone stock, I initially intended to keep it that way. After a couple months I bought a fuel pin for it (more fuel, more power, definitely worth it) and it started to bark the stock turbo.
So that started a slipperly slope, as of now it has:
Denny T fuel pin (way worth it)
Dynamic timing device (probably worth it)
Dynomite diesel injectors, just a touch bigger than stock (mine were leaking)
4" Diamond Eye exhaust for 93 Dodge, fits well
Stock timing
Injection pressure turned up all the way
HE351CW turbo from '05 Cummins
If you do anything with the turbo other than big $$ aftermarket stuff, do the HE351CW. The exhaust housing is half the size so the turbo spools much faster, 4" exhaust outlet vs. stock 2.5", the turbo wheel is bigger and the intake plumbing is bigger. All around means a faster spooling turbo that moves a lot more air more efficiently.
At this point I think I'm done messing with it, it works great towing my buggy around. Plenty of power, reliable, efficient, not much more you could ask for!