Going to try with the Dodge radiator. Probably will not mess with an intercooler at this time, since this era of Cummins was non intercooled to begin with.
Welcome. For your 4wd swap needs the consensus is to find a wrecked XJ Cherokee and utilize as many components from it as you can. Everything from the B pillars forward are identical. Not sure though if you can keep your 2wd transmission...