Scat Pack 4 piston Brembo calipers and rotors
In regards to ear mount calipers being difficult to make work, here are layouts for a Scat Pack caliper and a '07-14 GT500 caliper with a 13" rotor. I don't believe here is a way either could be done.
The only way I could make either of these ear mount calipers work was to step up to a 14" or 14.2" rotor. But that removes the 17" wheel option, 18" only.
So Andy, you are right that there are issues that ear mount calipers cause, no argument. And a radial mount can be easily made to work with a 13" rotor.