[brighton911]

My experience: I had to experiment with a variety shims under one of the front brackets to get one troublesome side to have no binding. In the end, both sides glided effortlessly up and down. Both front tie down hooks had scars on them from bottoming or hitting things and I believe most 911's suffer the same. I think those impacts deform the front torsion bar holders just enough to cause trouble.

So try moving the control arm with the rear bolts tight and the front bracket(s) loose and gradually tighten the three bolts until you find which one(s) being tightened causes binding. Then start your fun with shims.