If you are keeping your frame-side control arm mounts, take a good look at the welds. We don’t know if it depends on the day of the week or what, but some TJs (especially the earlier ones) had shoddy welds holding the control arm mounts to the frame. The same goes for the welds holding the rear crossmember to the frame. Give them all a visual inspection and if anything looks questionable, grind it out and melt some good metal in there. We’ve seen both frame side and crossmembers rip off the frame from bad welds.