The U bolt going adjacent to the diff on pass side is definitely a longer U bolt, for that reason. The other 3 front U bolts are identical and shorter. I did the OTR front leaf spring leveling kit with the atlas leaf springs, which are thicker than oem. As a result, The nuts on the shorter U bolts were mostly falling short of full engagement. I bought longer U bolts and new nuts for these front 3. The longer u bolt near the diff is plenty long, even after the bigger springs. There are a couple of good threads on the forum about this, can’t remember where though. If I recall, I think I torqued mine to 65 ft/lbs.