68zippy check out the web site I posted in my first reply they show you how to wire the alt to sence the voltage in a better location than factory. then the alt will charge better. I would install a volt meter so you know for sure what the alt and batt are doing. volt meter is far better than an amp guage and easier to install. Also check the voltage with a volt meter at the battery and at the back of the alt it should only be about 1/2-1 volt difference. With the lights on bright and hearter blower motor on high the voltage at the batt should be 13.8 - 14.8
