Hope everyone is taking care out here - got a question, looking at a ‘68 SS to purchase; the gauge is ther for heat & AC but heat blower works faintly. What should i expect to restore heat & Install new AC? Thanks, wg

 

Heater gauge? What exactly do you mean by that? Temp gauge?
That would have nothing to do with the heater/AC unit other than telling you when the motor is warmed up enough to put heat out.
Cost will vary a great deal depending on what all is needed,heater fan or switch may just be bad as far as " working faintly".