Good, that's what the backside of the cabinet looked like in the picture, they didn't show the original radio out of the dash. I just went back and reread your original post, gets kind of confusing when your trying to keep up with three different forums and a dozen or so different threads.
So are you saying that the GM “Auto Radio Model 510” is the same as the 986443 Delco (United Motors) radios just with a different bezel??? The 443 was the only one I remember seeing at Keith’s site.
Denny Graham
Sandwich, IL