Sorry to hijack this thread but I have a similar issue, wondering what to do with the rears. I have a 91 GT, and right now I have 2000 GT Brakes. Front spindles are out of a 2000 GT as well as the rotors and calipers both front and rear. Im running sn95 axles out back. I just converted over to 13" rotors with Cobra Calipers up front, now Im needing to add some 11.65 rotors in rear to match. What all do I have to do to make the 11.65s fit?