'One of none'? How sure can you be of that?
In 1964 when the A833 came out it was not listed in the sales brochures as an option with the Poly. I don't think they mentioned whether or not it was available with the slant 6, but it did come with the big block.
Yet in the Style Guide, a factory pre-production document, it says that the A833 was available with all engines.
I haven't seen any of the documentation for the '65 models.
On the other hand, I would sincerely doubt that the factory would knock back a dealer order for an A833-equipped car as all the parts existed for it to be manufactured down the production line.
Are there figures available on these things?