I only show it being the same in '63 and '64 Dart and Valiant under that part number. Shows '63-64 Chrysler and '63 Imperial too. I show the '65 Barracuda and Valiant, '66 Valiant S.W., and '65 Dart and Dart S.W. as being 2575038 and '66 Barracuda and Valiant except S.W. being 2575095. '66 Dart except S.W. is 2606179. It's always possible that the change in part number reflected a tiny change in the part, where they will interchange even though they may not be exactly the same.