I'm driving home tonight and my 62 starts to "sputter". Seemed like a fuel issue at first. I could take it out of gear and get it to rev but not consistently. I glanced at my gauges and the voltage showed 0. It stalled and would not start. It was now acting lime a dead battery and the gauge would not go above 8-9 volts. So... bad battery? Alternator? Anythng else?