Dang U-bolts!

I couldn't get the u bolt nuts off the Duster with my air impact gun. I used penetrating oil spray and wire brush and muscled them off with regular old wrenches. Then chased the threads on u bolts and nuts. Put it back together with new leaf springs hand tightened to what felt right with torgue specs at least in mind. Oh yeh I bought a new higher torque impact gun after that !