INFARMGUY, Looks like you have a bunch of extra holes in your dash. The one above and centered on the radio may have been used to mount a “stop light viewer”, especially if your truck had/has an exterior sun visor.
~ Dan 1951 Chevy 3 window 3100 Follow this story in the DITY Gallery "My Grandpa Carl's Truck and How it Became Mine" 1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)