You do not need an LIM, (or UIM) all you would need is an intake set (if that is the problem) Yes, due to the age of the car, a new radiator would be cheap insurance! Check
RockAuto for best price. They have several for $99.00 - $115.00 ea. Once again, do not get confused reading post about UIM failures on Series II Vin-K engines, if original, that is not the engine you have!!