People keep getting the models confused and it could be because of me so let me go back to step one.
2.5 YJ 1990 was the original engine - everything else on it is for the 2.5 minus the engine, trans, t-case
donor 1988 cherokee, I have the engie from that - a Ax15 and new Tcase.
So radiator, exhaust, fuel system (tank, filter, pump) is off a 2.5 1990 YJ.