How Rare? Asking for additional information

I bet a B&W interior looks better than an F6 interior with that color of green.
They seem to have made a lot of F1/F6 (of the F1 cars).

A/C was still not as prevalent in 73 as it is today (IIRC it's still an option on a camry), although the likelihood of finding it is much more than pre-70/71-ish.
Perhaps a little less so on A (and E) body cars.