I am changing my 1940 Ford Deluxe from 6 to 12 volts. This year car uses a volt meter rather than an ammeter. I can not use a RUNTZ 12volt to 6 volt reducer for this voltmeter. Called Don Baxter about alternatives. He said he had no alternative for my standard voltmeter. Does anyone have an alternative keeping the same appearance voltmeter or do I need to change all my gauges in my instrument panel?