I've read about some using a TJ 3/4" poly spacer in the rear to help combat any possible sag with the leveling kit. There was the concern about this popping out or being unsafe. I checked with RRO and got their installation instructions for their 2.5" lift. It looks like they use a plate that mounts under the A-Arm, with a long bolt that goes up through the top of their 1 5/8" spacer to secure it.
Has anyone tried a TJ 3/4" spacer and then using spring retainer, mounted like in RRO's kit, with a longer bolt? ie Drill a hole in the center of the stock coil alignment cap (not sure what you'd call it), pulled from the A-Arm and placed in the top of the 3/4" spacer, then run a longer bolt up through the bottom of the A-Arm through a hole drilled in the cap? Does this make sense?
Spring retainer like I'm talking about