…the one I would want the most would be a 1971 Dodge Coronet wagon (can you say: Rod Shop Drag car???).
Right behind this for me would be either a 1969-71 Chrysler Town and Country, or a 1968-70 Satellite Wagon. These would be great tow cars for race cars.
The Mopar wagons that would probably have the most sales potential would be any ‘63-‘65 Dodge or Plymouth. These could be done to offer both stock and drag/ street toy versions pretty easily.