Voltage regulator

This is just a FYI, and donesn't apply to the OP's problem, but.
Many people do not want to upgrade their early charging system to the newer 2 wire field alternator /regulator.
This regulator is a direct replacement of the old single field wire charging system, and is adjustable. Fits cars and trucks. It is a copy of the old Mopar Performance regulator, except this one is adjustable.
https://www.ebay.com/itm/3019615528...Rj3cCaUS8XLI5sSV6qF+mQ29dpE=|tkp:BFBMyIeQnqxm