I just installed my RC 2.5" last week. Did rear and steering stabilizer one day, did front end 2 days later. You will need a spring compressor. I had v-8 zj springs with 2 1/2" spacers in the front, and the rc springs were 1/2" longer yet, and I added a 1" spacer. In rear I had stock fronts; again, RC springs were longer. In front, with swaybar discoed, control arm hitting top of bracket, and jacking up opposite side, still needed compressor.
Soak all of the shock bolts with wd-40, pb blaster, something...I broke off 3 of the rear upper shock bolts when I put in new shocks 3 years ago...royal PITA!!! Used small cutting wheel on die grinder to cut 2 off, other one I was able to chisel off, and still had to drill holes so bolts would fit through. I even cut off part of the inner fender well to do this(no BL at the time).
Oh, and put the stickers on the shocks after you install them...wouldn't want to not be able to see them nice stickers