I had to get the rear leaf springs (frame mounted) bolts. The stock ones did not fit into the bushings supplied. This was using the rough county springs and bushings, the Hell Creek may be correct. I replaced all 8 with grade 8 anyways. Thats one bolt you dont want to break. Also dont bother with relocating the rear track bar, just remove it. Discos are good, I bought them but never have them attached(unless doing a lot of highway driving), I replaced the brake lines with stainless steel extended ones too.