I recently purchased a 72 GS convertible with a strange possible "option". It has a power antenna with a control button mounted on the dash by the climate controls. The other issue is that the antenna is mounted inside the left fender-not the right like one would expect. Also- the windshield does not have the antenna built in. I have not seen another GS with this "option". Seems strange to me-anyone have any info?
Look at the cowl where the winshield antenna usually plugs in and see if there is any provisions for the plug if not maybe you got an odd ball.