Do yourself a favor, go here and pick one of these lifts instead:
DPG Trailgunner TJ Hybrid Kits | dpgoffroad.com
DPG will work with you and customize spring rates to your exact needs. The components are all high quality, most are made in the USA except for the OME components. I have had a DPG lift on my Jeep since 2005, and I'm happy with it.
These lifts are combinations of suspension lifts, body lifts, and motor lifts. They take a little more time to install, but they are worth it.