There's a simpler way to get a hot spark for starting, and save the points. Just install the same type of ballast resistor system that the 12V ignition systems use, and retro-fit the starter with a foot switch that has the small side terminal to bypass the resistor during startup. Use a 1 ohm 200 watt wire-wound resistor in series with the ignition switch and bypass it during starting with the side terminal of the start switch wired directly to the coil. That will avoid spending any more money unnecessarily on another trick coil, and still give you the hot spark boost during startup that you apparently think you need. Does anybody really believe Pertronix actually makes their own coils?
Jerry