Negative, it is a B as in Boy. I checked the PHS documentation, and the car was shipped 11/22/68 to a dealership in Libertyville, Ill.

Oh, and the broadcast sheet also matches everything as well.

So, obviously it could not have been built after it was shipped. I'm not sure what that does to the numbers exactly and maybe it is an issue with paint, interior, etc... that leads to the funky numbering.