I'll try to explain the best I can. I have a 2000 LT Suburban with ford keys 1.5 inch spacers in rear. Front is lifted about 3 full inches and even with the 1.5" spacers in the rear, the rear is lower. It sat about 37.5 inches in the rear. I picked up some Z-71 coil springs and threw them on with the spacers expecting to get 3/4"(from what I've read). They gave me 2 full inches on both sides. It now sits at 39.5". Now to the question. It looks like all the kits need to know if your are a Z-71 or regular suburban. Is this because of the 3/4" difference in height or different shock mounts? I NEED to upgrade at least the rear shocks bad and know the bilstein 5100's are good, but I don't want to pay an arm and a leg for them. Are there any stock to mid grade shocks that are okay for my setup? If so what are they? Thanks in advance for the help.