the Duster was nearly branded with the WB Tasmanian Devil character, following the success of the Road Runner, inexpensively licensing that character from WB. But no agreement was achieved, and the car’s name instead referenced the Taz “dust devils”

 https://silodrome.com/plymouth-duster-car/

Keep in mind that the Super Bee was a Dodge/Mopar invention for much the same reason, once Chrysler realized how much better the Road Runner was selling, they began the sticker thing, as far as I know... with the 67 Road Runner