sfsutton,
I am watching these responses with great interest.
1954/55 GMC trucks have their radio speaker mounted in/on/attached-to the overhead cardboard. There was a hole in the cardboard,
a cover on the cab-side of the cardboard, and the speaker above the cardboard. This was a rather stupid arrangement because the cardboard would sag and/or rip, and the speaker/cover would simply drop out (I think).
