My brother got a '79 Trans AM with a 403(maybe?) big block and t-tops. No bird on the hood as the car had been repainted and the decal cost as much as the car. His second was a retired 1990 Mustang LX 5.0 SC State Trooper car. 2 door notch back. We had the 90 and the 92 simultaneously.
Mine had an SVT Cobra intake, larger mass air and throttle bodies, 3.55 rear gears, etc. His had all the decals from my go fast parts.
I wish I'd have kept either of the Mustangs as I didn't get terribly much for either (more for the '65) but both would be worth much more today. I'd guess, prob $60-70k for the '65 and probably $30k for the Fox body in the shape I sold it in.
I'd love either today, but would have a 5.0 Coyote dropped in it.