front passenger door for 4 door

I would check Hollander. believe that dart and valiant only shared all four doors for last two or three years of production, meaning 74 / 75 and 76. I had a customer ask about an early dart rear door, and the valiant came up as being different. the front doors, maybe? they will interchange over a greater number of years.
probably was due to divisional differences that they (chrysler) decided to do away with later in the production cycle to lower costs. Have access to paper hollander catalogs (42nd Ed, 1976) to confirm if interested.
the pics are of a 68 valiant hulk, and the body crease line on the rear doors is different from the Dart.