if you want to add an intercooler, i think you have to get a new intake manifold, aside from the intercooler assembly. I checked out some 4d56T's in Banawe and i found that magka-iba ang itsura ng intake manny nila. Of course you could get aroung this problem by modifying the hoses, thats if you dont like to go stock :D

And tama si kc. To maximize your new Intercooler, better check the hood. Intercooled pajeros have special air ducts underneath the hood to feed the intercoolers cool outside air(Gen2 95-97). Of course, 2.8L models have the hood scoop (wala na pong ducting coz the air comes directly from outside).

hope this helps :D