The more you can make that engine breathe and exhale the more power you will get out of it. If you are already starting off with a short block, might as well throw a cam in it. This will be your biggest gain in power once tuned.
On the intake side I'd replace the poppets with the redesigned fuel injectors, put a v-max intake spacer on the truck to make the intake breathe a bit better, a bigger cam (Comp Cams makes quite a few good truck cams), and do the required head work to support the cam.
On the exhaust side, long tube headers, bigger piping, and free flowing exhaust with the catalytic converters.
A 411 ECU swap with a tune will tie it all together, make it run right, and get most power out of the setup. Figure about 25% drivetrain loss on a 4x4 and I think you can get the engine up to about 230-250 WHP safely.
