I have a 1947 3100 AD PU with the side vent with the knob and 'fiber' gasket as shown in Brad Allen's pictures. I also have two holes in the vent door. I'm thinking it was for a cowl antenna. The truck has/had no radio. Can't imagine the factory pre-drilling holes for no reason. I was ready to weld the holes shut and metal finish until I saw those pictures. Anyone have any insights for these holes?
