Well... this is for one of the YJs... I put the Pro Comp coil conversion on in 99. I now need new coils and of course the kit is no longer made. I have done the research and found out that the kit basically has the stock front coils from a TJ and it gave the rig 5" lift. (front coil is under frame, not in a housing net to shock like the TJ for example). Since I need new coils anyway I plan to put 2" TJ front coils on all four corners. This will have it sitting like my '03 Rubi with a 6". Because the PC kit came with fixed arms (that also need new bushings) I figure I will change out the arms with adjustable ones so I can ensure the proper pinion angle. (GREAT info I found via this forum since I've owned the TJ).
* I post here because control arms is a foreign term in the YJ forum. lol. Besides, it really is more of a TJ by now.