First question / Early A

Hello Germany. Richard Petty ran a 65 Barracuda drag car while Mopar was boycotting NASCAR. The Barracuda used the Valiant grille. It basically used his signature shade of blue with white lettering. The color is referred to in Mopar circles as B3. In '72 it was called Basin Street Blue. A closer shade to Petty's than the Mopar is Ford's 1972 code J, (aka Grabber Blue)

The other person worth googling would be Scott Harvey who ran rallys in the US in various Mopars. Although they did not run a Valiant, the paint scheme for the Sox and Martin cars would be striking and period appropriate.

Viel Gluck!

Duh! Check the Demon in my avatar. That's painted in the Grabber Blue, J Code.