Jeep Cherokee Forum - Absolute no frills Comanche

I haven't been on here and several years so I'm a little rusty on asking questions, especially about anything Jeep related. I just realized that I have had Renix era XJ's and MJ's in my life and didn't pay attention to squat. I have turned a few Chrysler era XJ's inside out so I'm quite well versed on those.

Now to the problem at hand. I have a 89 MJ that I had to snag because of price. They go for a few bucks short of a platinum mine around here so finding one for cheaper than $500 is unheard of. It's a 4.0 auto 4X2 with no options (including A/C). It's got some rust and some cracked unibody frame rails to repair, but it's got potential. The problem is the fact that there are mainly Chrysler era donors around me and I can't remember what all is swappable from the newer ones to the Renix bastards.

I already decided to stay with the current opp system because I know how good they can run. I have a H.O. head and intake and might possibly go with a heart intake if one falls in my lap. I know I can use a high pinion D30 with no incident, but I'm not sure about the tranny. I remember the bigger spline output for the Chrysler era AW4, but I'm not sure of what all will plug in without modification. I suppose I could try to make this tranny a 4x4 tranny and upgrade the output shaft at the same time, but I believe that might be beyond my abilities at the moment.

Another goal of mine is to make it a fully decked out model as opposed to stripped down no frills. I haven't done power conversion to one of these yet because I either had an all options jeep or had a stripped down beater I didn't care much about. If I have extensive 91-96 XJ's at my disposal, what all power options can I grab that will be the least pain in the arse to swap in this thing? Also, how about A/C? How much of that stuff will I absolutely HAVE TO get out of a Renix model?