It wasn't just the rear springs. All 93 and on LWBs and some SWBs had air-suspension. It's easy to change to coils. I wouldn't avoid any RRC but then I'm biased
. The 87-88s had the LT230 transfer case with manual CDL and no ABS. I converted my 93 to an LT but it's not exactly inexpensive. On the other hand, mid 93 and on had 24 spline axles which are stronger than the prior 10 spliners. If you want the best of everything you have to build it.
SC