What i would tell you to do is reverse that offending bolt, with the head on the outside, and the nut on the inside.[/COLOR] See if that works, and doesn't interfere with the inner surface of the rotor.
I had the same problem. Using a '68 BB k member and '67-'72 LCAS with sway bar tabs and '73 and up disc brakes in a 1971 Duster. The bolt for the lower ball joint would hit the sway bar tab. I was able to correct this by using a narrower locking nut and grinding a couple threads off of the bolt. Now hits the bump stop on opposite side before hitting the sway bar tab. Hope that helps
The bolt and nut is pretty long, but its worth a try. If anything I will cut the bracket and redesign that one edge. Probably not that easy knowing my luck.