Q.I've got a '55 DeSoto Firedome two-door Sportsman hardtop with 57,000 miles on the odometer. It has the 291ci Hemi and a Powerflite transmission. I've rewired the car and converted it to 12 V so I ...
Edgar, it turns out that most muscle car-era GM factory tachs (including the one in your Chevelle) actually run on full 12-volt power. These GM tachs are a three-wire design: The main power-up wire ...