unibody front, frame rails back
let me know if im wrong
you are right
look for the metric ton package (hard to find) thats the towing package it has the dana44 in the rear
if its a standard you want the ax15 tranny
heres mine right after the new paint job it has a 5.5 in. lift and 33's
just like with a Cherokee, 87+ are the good years with the 4.0L and better. Make sure the sub-frame is straight and that rust is to a minimum. You can strengthen the whole thing with stiffeners, but that will add a lot of weight fast. I have one here, just need to fix the fuel pump and then then fun starts.
Had I been more familiar to Jeeps, I think that I would have just done what I needed to get a differant tranny. That being said, my MJ was driven by a teenager who did some REALLY stupid stuff in it (some I am still hearing about). (i.e. was getting the oil changed in the company truck, heard tires screaming, saw smoke, then watched my MJ emerging from said cloud of smoke, with a riced out Honda on it's tail...)(yes, he denied it, at first). Not only did my son street race, but also (I am finding out) did quite a bit of mudding...but he doesn't understand how to go slow on trails, it was all about power slides and fishtailing. So even though the transmission was the weakest point of the truck, it still didn't get treated well.