I had this one custom done, pretty happy with it, but you have to be mindful of the additional weight when you swing the tailgate open, I broke two check straps before I decided to add a limiting cord. I do have a built in quick disco, so you can take it off, if you are not on the trail.
Mounted mine on the rear of the roll bars. Keeps it out of the elements. Get some exhaust clamps. Drill a hole in the flat steel. Run a grade 8 bolt through it, put wing nuts on so it's easy to remove the lift on the trails. I spent less than $10 on material. Or you can go to quadratec and buy the kit that is overpriced. I mounted mine low (like in the pic of this Jeep I found online) in case of a wreck the lift is behind the seat so no one would hit their head riding in the back seat.
I did this awell, best cheap alternative, dont keep it outside of the jeep unless you like using rusty tools
'98 TJ Manual -2.5" rcx long arm on 31
'99 Xj, Stock on 30"
'86 Monte Carlo 357 stroker. 450hp.