The latest car I'm building is not going to have a radio at all, only an iPod jack. The factory AM doesn't work and I didn't want to cut up the dash to put a modern stereo in.
I found a small amp, about the size of a cigarette pack, that I can hide under the dash and run the iPod wire under the carpet with the plug coming out between the seats.
I have over 25,000 songs in my iTunes library so I don't think I'll miss the radio other than Saturday night, Twine Time.