Below is a screen grab of a dash panel with the original radio openings (center rectangle and 2 close in Control knob holes). Your dash got modified at some point. An original radio would have filled the center rectangle and 2 closer holes that center on the middle opening.

Is the radio displayed in the picture the one you intend to use?
Attachments
IMG_4334.png (2.32 MB, 136 downloads)



~ Dan
1951 Chevy 3 window 3100
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"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)