Car is going quite well bar the above. Idles smoothly at 1000rpm,I have one radiator fan connected,the LH fan relay disconnected With RH fan on battery reading is 13.5V,turn on cabin fan and the reading is 13.4V approx,then I turn on AC also and engine dies as voltage drops to under 13V. I am losing electric power for no obvious reason. Anyone else have this problem,its a 79 DINO with carbs and factory electronic ignition,single dizzy! All solutions accepted. The stall occurs when I slow down to turn or stop,not at speed.It is an intermittent event?