I don't know if you solved your problem or not as I don't see any reply to the suggestions. This is from the Chevelle forums and deals with your over charging. Check it out. http://www.chevelles.com/forums/archive/index.php/t-156702.html
----- Original Message ----- From: Peebles, Lorne (Services) To: chevelle-list@chevelles.net Sent: Sunday, July 20, 2008 3:54 PM Subject: [Chevelle-list] alternator charging Quick questions. I have 66 Malibu BB. While running at idle the battery is charging at approx 17Vdc. I have a Delco Remi with external regulator. I worry that this is too much and don't want to damage new battery . I also have a electrical short I just can't seem to find. With battery disconnected and the key out I find a resistance of around 20 Ohms, indicating a closed circuit or short. I have pulled all of the fuses and taps but can't get the short isolated. Any ideas or recommendations greatly appreciated as always.