I think you should convert your Cherokee XJ fan clutch to an electric fan. This way, the fan won't be coming on every time you turn on the ignition, and will be used as and when required. A constantly running fan wears some parts down fast.
As a licensed mechanic, I can tell you this: a fan will NOT wear anything out. Putting in an electric fan is nice if you're attempting to gain a small power increase; on the other hand, if you are wiring the fan to a rocker switch on the dash you will occasionaly forget to turn it on and possibly overheat your engine. there are pros and cons to both.