Pertronix (1285LSP6) 6V Positive Ground Ignitor for Ford Flathead 8-Cylinder Delivers twice the voltage to the spark plugs, increasing horsepower, fuel economy and spark plug life 2:1 improvement over "points" in current fall time for increased coil output Rotating cobalt magnets trigger a Hall Effect integrated circuit; no points to burn, no moving parts to wear out Epoxy molding makes our module impervious to dirt, oil, grease and moisture Stable timing no need for any adjustments