'65 Formula S with "factory" 727 and 8 3/4?

Are you saying it was an 8 3/4 swap or factory installed (or who knows)?

IIRC (and I might not since it was 15 plus years ago) the date code on the pumpkin was Mid June 65. The build date of the car was 7/23 - a real late build car. Still have the fender tag.