First, thanks to Chris - crocha617, I picked up a thumbwheel AM/FM radio for my 70 challenger. Cleaned it up, and all indications are that it works.
Pulled the placeholder AM radio out, and found that somewhere in the past, the speaker connector go cut off the harness. I'd like to find the mating connector to splice back in, if someone knows of a good source, or has one they'd like to sell.
Thanks