What "makes" a 66 Barracuda a Formula S ??

I'd sure like to see that window sticker. It must be a real late build and may have other options that were not thought to be available in a '65.
I don't remember if I even had a camera with me. The antique store may or may not have had a copy machine. Times were primitive compared to today. I would love to have a copy of it as well. I also recall a special order paint code (yellow).

I'll bet that this is the same car. The window sticker and broadcast sheet are in the pics. The whole writeup doesn't exactly jive with what I remember her telling me. I also don't buy the "delivered in September 1965" story.

1965 Plymouth Barracuda Formula S Sports Hardtop in St. Louis, MO