bucket seat help

1975 Duster Custom / Duster 360 / Scamp also Dart Swinger / Dart Sport- http://www.hamtramck-historical.com/images/dealerships/colorAndTrim/1975/75_Valiant_Duster_0010.jpg

1976 Scamp / Dart - http://www.hamtramck-historical.com/images/dealerships/colorAndTrim/1976/76_Dart_0009.jpg