Sizes of Thumb Wheel Radios

Yes, the key looking slots in my dash frame are my mounting holes. The picture is not showing the one to the right good but shows that the left side requires a mounting bracket that points up. The hole in the frame is the one that is only 2 by 7 inches. Here is my radio. I’m going to go over to the classifieds and propose a swap.

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Maybe yours is a B body radio? My 69 A body thumb wheel radio has chrome buttons.