On my '67 Fury III 318 engine, I have been having problems keeping the battery charged. I replaced the alternator with one from Autozone (45 amp double pulley) about a year back. I had them test the alternator recently and it passed. The battery is a Napa 72 month which is 4 years old. I took it to Napa and it tested good. If I charge the battery with my portable charger, it is good for two to three weeks. I checked the battery with the engine running and got about 12 1/2 volts with the engine reved up. Then I looked at the meter and it read a little over 13 volts at idle. It raised up slightly when I reved up the engine but then was back to 12 1/2 again with very little increase when reving the engine.
I am using the grounded brush system with an upgraded solid state regulator. Could it be a poor connection possibly in the bulkhead connector. HELP! Any info will be most appreciated and I aopligize for the long post.
John