Alternators, who runs what?

Running an original stock 46 amp unit on the Dart /6. Lights were very dim and HVAC fan barely whirred at idle. Weekend well spent cleaning up bulkhead connections at firewall. Lights are stronger and fan blows. Before, I did not have power to run 1000 watt (380 watt RMS) 4-channel amp in trunk. I'll try to reconnect the amp in the next couple of weeks. Have other projects more pressing at the moment.