AC is somewhat unusual for a ragtop, but by 1972 it was more popular than you think. I'm overseas so I can't tell you how many ragtops had AC, but it's listed in Kevin Marti's book.
Wow, that car is an awesome find!
FWIW, I still can determine the sequence number on your car. I don't know what good hiding it will do, but you haven't hidden all of them.
Could you expand on this?
For example, if you're talking about 1969 Mach Is, I understand since Marti doesn't distinguish between SportsRoofs. But most any other Marti I've seen shows specifics for a particular model and body style.