Just to help people with different T-tops... .. this is the "C & C" top.. which were an aftermarket fitted top .. many have found there way to Australia as C & C was a big seller in the California sun etc.
Basically .. the coupe was driven into a workshop.. a rectangular pattern was laid across the roof and the cutting followed. Then a "H" frame was laid in and rivetted into place, caps placed on the exposed edges, new seals fitted .. and Bob's your Uncle.. A T-Top Car...
This is what they look like from above.