iro's ride softer then the claytons. the wj's have a lot of body roll in the first place, go with the claytons. depending on either the 4.5 or the 6.5 springs ur going with the iro around 190-200 ppi spring rate at all fours while the claytons are around 200-210 front, 220-240 rear. i had claytons and i thought it rode awesome with the 5150's shocks.
00 WJ limited 4.7l HO paxton SUPERCHARGED 18 lbs, 9.0 Ross coated pistons, crane 224 cams, f&b 72 tb, 2008 intake manifold, scat rods, arp studs , ati balancer, sct tuned, 47 lb injectors, port and polished race heads,meth injection, 2800 stall , shift kit, Dana 60hd 4.11, Claytons, 3.5" lift, much custom!