I have an '88 K5 with 35" AT KO BFG's and a 4" lift. The lift consists of springs in the front and blocks in the rear. The rear was still sagging so I added a leaf to the springs to level out the truck. I have been running this setup for about 2.5 years now. My problem is that it is stiff as a board....not much flex....and riding down a mildly bumpy road will just about send me and any passengers thru the roof (I actually one time had a girl in the back that hit the top from a bump in the road that just sent her flying.) Anyway, Now I'm looking for a better ride for the old truck...the stuff I have now is 'ruff country' I think. The truck sees more streets now than anything. Any suggestions would be good. Also I might go to a 6" lift for more tire clearence. Thanks.....TA69MAN