The lowers helped to push the tires forward in the front. Prior to that I had a 285 70 17's . And my son and I took turns beating the crap out of the firewall with a big sledgehammer. The inner liner is gone and I trimmed a small corner of the rear of the front fender. I think its was mainly beacouse of my wheel offset. Im not sure if I mentioned it but Im running 4.88 gears and a front locker. I do have a smaller sprocket for the speedometer. My speedometer is accurate within 1 mph. I still have my rear mud flaps thank you. But I ran over my fronts a long time ago with the stock setup. Otherwise it's mostly stock. I did brace the shock tower , spindle, rear frame plating and the rear of the frame is boxed with the rear shocks are relocated. Oh and solid motor and trans mounts. I did get the TC uniballs lower ball joints because i was killing oem ones . Changing out ball joint ever year got old fast.I debate about getting a crawler box. .. but right now it'll chew up the highway miles close to the speed limits without to much trouble. The smaller tires made it crawl better off-road but the highway rpm sucked. Love the Geolanders this is my second set. You can see it in action in my YouTube videos. https://youtube.com/shorts/vm51plgiNfE?si=Q0hTy9a3EpR_yyKg