1949-53 Mercury All models flathead V8 (Ignitor version available in 6V negative ground, add N6 suffix, Ignitor version available in 6V positive ground, add P6 suffix, Ignitor version available in 12V positive ground, add P12 suffix, Not for use with solid core spark plug wires)
1949-53 Ford Flat Head engine V8 (Ignitor version available in 6V negative ground, add N6 suffix, Ignitor version available in 6V positive ground, add P6 suffix, Ignitor version available in 12V positive ground, add P12 suffix, Not for use with solid core spark plug wires)
1950-51 Lincoln All models w / Flathead engine V8 (Ignitor version available in 6V negative ground, add N6 suffix, Ignitor version available in 6V positive ground, add P6 suffix, Ignitor version available in 12V positive ground, add P12 suffix, Not for use with solid core spark plug wires)