I'm running one of the earlier Scarebird kits with GM truck calipers, early Jeep XJ 15x7's and 1.25 bolt on spacers. Never been happy with any of it... pedal feels like there's nothing there then almost locks up. Need to figure it out, but too many other problems, so it doesn't get driven much. BTW, no 14's would not fit mine.

I also had to make some additional spacers for my Fury rotor and clearance their bracket for the lower ball joint. I would assume they've fixed that by now.