Come to think of it, maybe only the 66 Landau had the overhead console. I've got a 64 and am not completely sure about the 66. I bet your 66 didn't have it to start with because removing it to cut a sunroof would've really been a big job. To see the factory original specifics for the 1966 Tbird, jump on the VTCI website at:
www.vintagethunderbirdclub.org. You might find other things about your car that have been modified or tricked-up over the years.