The radio parts of my 70 Challenger were not all there when I got the car, and I'm trying to play detective and figure out what the car had in it originally. It was a rallye dash car, and had a rear speaker control to the right of the heater controls. The was a small rectangular box a couple inches square that was part of the sound system, but the printing is faded off it, so I don't know what it did. There is a bundle of green wires that looks like it went to the rear of the car. Sorry for so little info. There was no radio when I got it. Did an am radio come with rear speakers as an option? One or two speakers? Thanks for the help.