Well...being that you have a 4x4 truck...where are you gonna put the intercooler? If you go low...you take a really good chance of crunching it anytime to do any off-roading.
I think once you figure out where yer gonna put it...it would have to have to be big enough to see a potential temp drop to increase the air charge. Yer better off going with carbon/teflon isolators fer yer air intake system to help reduce the air charge temps.
