In the short term, I do not see the dash plaques having much effect on value.
But who knows, at Barrett-Jackson 2052 some eccentric billionaire may pay a million dollars for a limited edition Challenger, and then spend 20 million dollars on a vat full of special bacteria that turn yard waste and sunlight into crude oil so he can drive it to his hearts content. Then the People's Protectorate of California will file a suit in the international court that his exhaust gasses are floating over the Rockies and harming their air quality, so he'll be forced to build an underground racetrack with a smog scrubbing ventilation system
