I found a deal on craigslist on a Pro Comp 6' kit that came off a 90 Silverado. I plan on putting it on my 96 z71. I talked the guy down to 600. Does that sound like a decent price? I dont really know how well the lift was taken care of. The dude says the entire kit is there with the shocks but may be missing only a couple bolts. I need some advice on this.