Alternator - regulator mismatch?

Bulk head or ignition is bad. I have just been down this road with a 68 super bee. Even after switching to a newer style charging system it sill was charging at over 15 volts . It ended up being a bad harness in the car going to the interior.

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I've already been through that mess. The 'welded' connection under the dash was wired with lamp cord and wire nuts!. New wire run and all soldered.