That is not a duster, it is a Dart Sport, and it is in fact a Hang Ten. Unusual though, I have never seen one with a vinyl roof. It is a sunroof car?
Also just for those of you who don't know, 75 and up A bodies had a different floor on the drivers side to accommodate a catalytic converter, and therefore the drivers side inboard bucket seat track is different from and will not work on 74 and prior cars. It is in fact quite a hard to find piece.
