I bought a radio from Classic industries (I believe) that fit in the stock opening of my 57 3100. It looks fairly stock until you turn it on. Then it has a green glow. The input cable is a jack similar to your I-pod head phones. I drilled a small hole in the side of the glove box and fed the cable through there. I plug in my I-pod and I have everything from Hank Williams to Aerosmith at my fingertips. I did not want a CD changer but it has inputs for that as well. This way I don't lose any space in my cab or glove box!!
Good Luck & Best Regards,
Panhead
