Ignition Electrical Question....

RustyRatRod said

I checked battery voltage VS voltage at the run side of the ballast today. Battery voltage was 12.7 and voltage at the run side of the ballast was just about exactly 1 volt less. This was static with the engine not running and the ignition in the run position.

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Voltage drop due to resistance in the wires going both ways through the firewall, the contacts in the ignition switch, the bulkhead and ignition switch connectors, and the Main Weld in the dashboard wiring harness. If you want rid of that volt drop, put in an ignition relay. Overspecify it, buy a dependable brand, and toss a spare in the glovebox.

Also, it's a nice gesture every now and then to wave a menu near the suppression capacitor on the coil +, of imaginary other jobs it might like to try thinking about doing.