This particular TATA was converted to convertible by NCE. 1 of 2 convertible TATA’s in the country IIRC, plus there is another non TATA 79 in blue.
Graeme sold it a few years back part restored and bought the 3rd gen Camaro.
Firebirds and Trans-Am’s is how Graeme and I met way back in 1994 when I had my first Firebird (1974) and he had a 1980 Turbo TA.