Fastmark, although it doesn't have the V21 code, does it have black hood stripes?
A87 describes hood stripes as part of the package.

Good thing the RR didn't get painted R6, the V6R red side stripes wouldn't show like they do on white paint.

I've seen two '70s cars with a typo on the VIN.
One a B body, one a C, they were missing the engine code, had 12 digits instead of 13, fender tag and door sticker were correct.
The V code error was on a 440-6 SFGT.