If it's a white car with red trim, it was for sale a while back; I don't recall if any proof surfaced that it was the Tullius car or a real D/Dart. In that era, it would've run A Sedan, along with Barracudas, Mustangs & such; that was the predecessor of TransAm.
Unless I'm mistaken, the D/Dart program was drag-oriented, for an NHRA Stock class, not that it would preclude one from being adapted for use on road courses.
Go back to 60-61, and you'll find where Chrysler used Slant 6 Valiants at the Daytona sports-car race.