Last of the Dizzy Mods........ I Cut off the other 7 teeth on the Nascar Reluctor then drilled and tapped it for 2 set screws. It fits pretty tight on the shaft, with using the set screws and Red Locktite on the threads, it should go nowhere. It is fully clockable so you can make sure the Cam Signal and the Crank Signal do not happen at the same time.