Rico,
One thing is stuck in my mind. I wonder if they were a phantom. To built those cars late was bad business.
Once the cards were punched out can it be varified they were all built and shipped all over the country?
With the 65 model year in the planning phase I find it unlikely that much effort was spent filling this run.
I don't know if the known cars are sprinkled all through the so# (vin?) range, or not.
One thing for sure is there are not many around today and I find it very unlikely that they all went to the tracks and were wasted.