One of One Rare Car

Very cool Valiant.
I don't know if its still around, but I used to see a red 65 Valiant Signet convertible at some local shows that had the factory 4 speed and 273 4bbl and the 14" bolt on style wheel covers. I don't know about the optional suspension.
As for Valiants with the Barracuda grille, the Mexican built 65 Valiant Acapulco convertible and 2 door hardtop came from the factory with the 65 Barracuda grille, but were otherwise Signets.
As for the Valiant in question, if it did indeed have the Formula S package, wouldn't that have included blue streak tires rather than the white walls that show up on the window sticker?