How does one tell if a 72 stock radio is a stereo radio?
Not sure I am following you?
Without the "build sheet"/order copy, there's no way to determine what radio came in the car from the factory. It could have come with no radio, an AM/FM, or AM/FM stereo. If you are trying to determine if the radio you have is stereo or not, it should have a small red(or yellow?) light that lights up when a station with a strong stereo signal is tuned in.
Joel Adams
C3VR Lifetime Member #56
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
Thank you Sir! I will look for the light.