[opelmeister]

There should be the "U" shaped support bracket that is attached to the firewall and when another replacement radio was installed the bracket was probably removed. It should be easy to replicate if someone has the dimensions.

 

[opelmeister]

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

A great reason for taking before pics.