This is a great kit to replace the stock points and condensers and modernize the ignition system! The Dyna S Ignition System is a complete self-contained electronic ignition system built with the latest state-of-the-art engineering. This is the same ignition used by top racers over the past 2 decades. The Dyna S is completely housed behind the ignition cover and uses a magnetic rotor with the original spark advancer, so the factory advance curve is maintained. Wires on the coils can be mounted on either terminal (no polarity + or -). NOTE: This does NOT fit the "ND" (Nippondenso) ...