Yesterday I finished up our 4" spring Zone lift. When attaching the rear track bar I've read here that you need to push / pull the jeep over to get the bar to attach....some even say you need to use a come a long puller
to get the bolt / hole to line up. If you elect to do this and after all the cussing, busted knuckles and blood is cleaned up. Measure the distance from the outside of the rear frame to a point on the tire....now measure the other side. If you just installed the Zone lift with the vertical bracket to move the track bar up, the rear end WILL be shifted over to the right by 1". If you just did the same with a Rough Country lift it WILL be shifted over about 3/8". To fix the problem with the Zone lift you need to weld a small piece of plate to have some backing for when you drill a new hole 3/4" right of the existing hole to mount the track bar. A Rough Country lift bracket hole s off set about 3/8" ....its not enough to center the rear end. My Dad has a Rough Country and I have a Zone...we measured both yesterday.
Below is a photo of my Zone modified bracket...note the mounting hole for the track bar is 3/4" to the right of the factory mount.
The front end ...Zone recommends to drill a new hole 3/4" to the left on the welded bracket. Doing this is EXACTLY what they and RC should of done for the rear.
Either track bar, front or rear can easily be installed without pushing, pulling , cussing, busted knuckles and without any blood shed if you make this simple mod. Most importantly...the rear end WILL be centered on your TJ