Make sure and count the turns you take out of the adjuster bolts for the torsion bar keys. It makes leveling it out a bit easier. FWIW I used the Belltech replacement keys on mine recently and it got it way low. I used 2 pairs of generic cone shaped bump stops (Energy Suspension) to set new stop positions. They pretty easy to cut to the height you want. To find the torsion bar key and it's adjuster bolt, find the torsion bar at the back of the control arm and follow it back to the cross member (should be just under or behind the seat bolts on the inside of the frame. The bolt is either 17 or 18mm, I can't remember right now. I'll also make a pitch for a set of belltech leaf springs and Jags that Run (JTR) set-back plates. This keeps you from bottoming out. Many here on the forum have the back end bottom out using blocks, others don't.... Search for lowering, suspension, etc... here. Read up as much as you can and make your decision from there. There are several options and as many opinions on each. In the end it is your truck and do with it as you please. Have fun with it.