No fender Tag or Broadcast sheet means there's no added value in going with the original colour, as there's no way to prove it. The dash tag will prove it's an R/T
(does it have the inner door sticker as well?), and if the engine matches the VIN, then that's a bonus, but no definitive documentation means the true
numbers buyers will take their money elsewhere. You won't get
numbers matching money for it.
Paint it White. No blackouts, no stripes, and no spoilers Do not underestimate the emotional influence Vanishing Point can have over a potential buyer. A White '70 R/T will bring more interest than any other combo.
Edit: Painting the car to the buyers preference after the sale is a dangerous game. Once it's all done an dusted, they can turn around and so it's not good enough/not what they wanted etc. You're just asking for trouble, and I wouldn't recommend it.