I’ve recently started having a low voltage reading at night while at idle with the lights on. I have an electric fan, retro sound stereo and the Dakota digital dash. If I turn the heater on with the fan going, lights on, stopped at idle my volt reading drops to 10.9 and starts blinking. Jumps right back up while driving. I installed new battery, new belts, and a new stock alternator from autozone. Also put in a new solid state voltage regulator. Question is, would getting a higher amp alternator like a 100 amp boost up the volts at idle? Or running a smaller pulley on the alternator? If so do you guys know where I can get a higher amp 3 wire alternator or smaller V pulley for the alternator.