I have a stock suspension YJ. it has 16" 5 spoke alum rims on it right now. Bought that way. I have found that on hard turns the tires hit the left springs. I have the original 15" jeep rims. If I go back to them what size tire can I go to and not rub springs? Or will o have to do spacers no matter what? If I go bigger then stock size.
If your just going keep your stock suspension, then the max I would say to go is a 31" even with that you may rub a little if you turn real hard, or even if you go at enough of an incline you can rub then on the rear fender
Body lift would require disassembling all the body mounts and replace with new taller ones? I had to replace/rebuild 3 body mounting points when I fixed the frame. None could be unscrewed. I had to break the bolts or cut them. Dont know if I have the energy to redo all of them.