[dmjlambert]

My 2 cents: The stock alternator does not run newfangled accessories such as electric fans, not enough power. An alternator does not push power, items draw power from the alternator. If you draw too much power, the alternator and regulator can't handle it. The stock alternator can handle a stock A/C blower motor, A/C clutch, the distributor/coil, stock headlights, tail lights and an AM radio with single speaker. If you start adding other stuff to draw power, you need a higher power alternator and some additional wiring and relays to run the new stuff.