I have a 76 cj7. Its got a 4 inch susp. lift. When I stepped up from 33" tires to 35" tires I had a pretty bad rubbing problem. I went and made up some slightly longer shackles and got rid of the rubbing. I dont have any problems off road with it. The only thing I dont like is the fact that the front tires hit the springs at full turn. I need to get some 1.25" spacers at all 4 corners to be able to go full lock. But I can live with it for the time being.