how to get more 4x4 performance?

ok well i got my lift going, its haft way done(4"coils 1" spacers, soa) and i need to get more power in this engine before i go to much farther(4.56 gears and 35's) i was thinking

1)k/n drop in filter(cone filter not good for mudding)
2)66mm bbk throttle body
3)heddman headers
4) flowmaster exhaust
5)crane cam 410

im basicly looking for the best bang for the buck, i want to gain horsepower and torque, and keep using 87 octane fuel, and get 20mpg highway

 

[410Fortune]

"20mpg highway"

with 35's you can forget about that!
Heddman headers are kinda crappy.
Your stock intake is not good for mudding (that feeds the stock airbox)

Its a good list of mods, for sure
Dont forget to get a chip to tune the computer once this is all done.

Is this a automatic truck? I would seriously consider cooling upgrades if it is (trans and water)