Adjustable track bar is a nice way to center the axle back up. I have seen lots of XJ's with a 3 inch lift, 33's and stock track bar. Most of the are missing the right front fender flare due to the axle being shifted to the drivers side. The right front tire grabs the flare in a tight turn and pitches it off. If you are not running 33's this probably won't be an issue. for 129 and some shipping (Rough Country) you can get it all running straight again.