texas t,
Perfomance Accessories makes the only one I know. It is a good solid kit. It took me about 20 man hours to get it installed. Gap guards are a must if you want your truck to look nice.
Many folks will have a lot bad to say about body lifts, but its not first hand experience
with this kit. They will usally mention about how the blocks break, shift or how ugly a kit looked on an old junky back yard beater years ago when they were a kid. I have put this kit to the test and have no regrets. After 2 years, I hauled 1,200 pounds in the bed for 2,500 miles, 4 wheeled on hill climbs and through lots of twisty terrian on a weekly basis. No flaws after several inspections.
Get this kit, do it right and you will have no regrets. With the Procomp and the body lift, you can run 37's with the right wheels.
http://www.performanceaccessories.com/