The U bolts were about 1/2" too short.
I had to purchase longer U Bolts locally for 40.00 because yours were too short by about 1/2". The nylon lock nuts liked about 3 threads getting into the nylon locking ring at head of mounting bolts. So, considering I had to pay 40.00 more locally, after tearing down truck, so I could get back on road, they were not a deal. Very disappointed with Belltech. I have purcased half dozen or so products from their name brand and never had problems before.