you can use the jeep T-case or the montero case but unless you are outside the US those jeeps will have dana 30's or worse dana 35's. Your best bet is the driverside drop wagoneer Dana 44 because these are closer to the right size and they are already 6 lug, They are leaf sprung but they are much cheaper than the cherokee axles. Like posted above if you want a link setup a bronco dana 44 would be good but you'll have to swap to chevy spindles for 6 lug pattern. There are endless axle combos and transfer cases but it really just matters what you want, how much work you're willing to do and how much money you have. The 2 axles i mentioned are the easiest.