I just replaced my drivers door panel in my '72 Cutlass S from the Supreme style door panel to the correct Cutlass S door panel. I highly recommend spending the extra money for the preassembled door panels unless you enjoy a challenge. I ordered the door panels from Original Parts Group Inc (OPGI) (PUI door panels) and they worked great!! Needless to say I only needed the drivers door panel so I now have a passenger door panel in reserve! It was agreat weekend to work on the Cutlass.