Alan,
My father in laws 54 had one when he first got it, it was made from wood and attached to that lip in the front and back and the headliner was cut into two pieces that went on either side of it. It had a speaker for the radio in it. We removed it and put a regular headliner in cause we it hung down so low we hit our heads on it whenever we got in. I've often thought of putting a modern one (I have one out of a D0dge D@kota) in one of my trucks.
Here's a bad picture of the one that was in my father in laws truck, I'll see if I can find a better one to send ya'.
Roof console MONGO
