The hole between the headlight switch and the choke is not from the factory. I think it was a good job of an added switch. Do you think the radio cut-out could have been filled in the past? look at the back-side of the dash to find any indication of welding or filler.

1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy