It was the Pop (Orange Crush) and the Montreal Expos, specifically Rusty Staub, which were tied to the Promotion. It was only a small series (5 or 6) 71 Dusters all with the same options. Auto, pins, wing, and V24. 3 of the cars were found when this chain started.
There was a guy with a green 71 promo car on here as well, just an early car to help with car sales. Love the demon, love to see the tag.
I can believe there was such a promotion. Chrysler Plymouth ran all kinds of promotional contests and give away type deals, also regional ones. I have a license plate in metal that is from a dealer of the Pittsburgh Steelers and Plymouth Duster.