Fordman, thanks for the pictures. The stock 67 is definitely a different radio. I think the bezel I had is correct for a 67, but the radio isn't. I'm guessing the bracket from a stock radio won't fit the Motorola and that's the problem. The guy I bought it from swears he took it out of a 67 F100.
Paul, I don't believe that radio on Ebay is from a 67. The larger opening in the bezel shows it to be a 68-72. See this FORDification page (towards the bottom) and you'll see the difference:
http://www.fordification.com/67-72ID.htm Ebay sellers constantly mis-label there stuff. That's pretty much how I ended up with the wrong radio.
Thanks for all your inputs. I guess that Motorola radio will remain a mystery for now.
Steve