Sandcritter, just put a puck lift on it. Cheap, you can run 31's no other work required. Maybe two different bumpers for approach angle.
XJ are great for medium rock crawling. Never going to be the best unless you want a trailer queen.
I have put the puck lift on 7 or xj's, that' the way to go Sir. 31's tires. Still real streetable and will go where you want to go, just not up and over big rocks or benches more than 18' or so.
Oh, may require longer brake lines at the tires.
