2012Coyote
Fuggit.
Sorry but what was the final setup with spacers?
Are you lowered on anything? Rub?
I have the 20x10.5's all around. Rear didn't require any modification, fronts needed a 3/4" spacer to clear the Brembos:
http://www.mustangwheelspacers.com/34frontspacer2with10longerstuds.aspx
I'm lowered 1" on the FRPP P springs. With 275/35's there's no rubbing at all except for really big bumps will touch lightly. No damage or marks though.