[Young Gt Lover]

My GT has a springy U-shaped, folded sheet metal "tray" attached to the firewall behind the radio that supports it. The rear of the radio slips into this device and it supports the radio on top and bottom. I believe that this was a standard feature on GT's.

Yea my gts have the same thing.

 

[Young Gt Lover]

I think this is the bracket you are talking about. It was there before I painted the car. Must be around somewhere. Thanks.

View attachment 454762

Yep that is the bracket.