For 1967 - 1969 Mercury Cougars and Ford Mustangs with the 390 or 428CJ engine. This is a Pitts manufactured pulley and clutch assembly with a pulley diameter of 6-11/16", a clutch diameter of 6", and an overall thickness of 1-5/8 inches. Whew, say that 5 times fast!
Ford part # C7AA-2981-J.