how rare is an 1976 duster 360 sunroof car !

There's a thread in the general discussion board titled 'What's a Hang 10' (or close to that title.............

There is a LOT of information, and a bunch of pictures of the car you have......I believe there are some links there too that might lead you to the actual production numbers..........

,,,,,,,,,,,and yes, it's pretty rare. 8)