I'm hearing a story of a 71 Challey... with no radio in the dash.... Not radio delete/block off plate-but dash moulded for no radio??? With a "portable" transister radio mounted underneath that you can carry with you. I know AMC had something like this long ago but Mopar? I know Mopar had a record player! This seems like a question maybe Barry would have an answer too.....? 
The radio delete plate is not a "block off plate" or some such animal, but just a standard radio bezel face plate with no hole, just a complete smooth face in black.
I have never even heard of such a thing as a small transistor radio that was detachable from the factory...I've been into these cars since 1974, owned too many than i care to remember, never seen or heard of that.
Does the car have an antenna? What's the code on the fender tag?
