Interesting. It would be interesting to find out the build date of the Feather Duster. Was it early in the production run or later? Does it have the foot brake instead of handbrake? Is rear view mirror mounted to windshield instead of headliner? Does it have the two spoke steering wheel and is the instrument cluster black instead of wood grain? Those are all ‘76 MY differences unless the factory was using leftover ‘75 MY parts. If the antenna mount is different too, that would be another. He must have removed the bumperettes.