I am using the same front brake system you are. AR engineering kit, Viper Calipers and 11.75 C Body Rotors on a 68 Barracuda. Do you have any issue with the wheels (Torque Thrust II's I believe) hitting the calipers since the calipers protrude past the face of the rotor by a small amount. Going to be looking for wheels soon and not sure if that will be an issue or not. And do you remember what type of backspacing and or offset was on those front wheels.