[Geary L. Sarno]

This is not related to MSD but I had a similar situation with my first Cobra buildup. I wired a Black Magic 150 fan to the "Run" terminal of my ignition switch instead of the "Accessory" terminal. The engine continued to run for about 15 seconds after the key was removed. The fan continued to spin for a few moments after shut down becoming a generator and feeding the ignition curcuit. I could remove the key - get out of the car and walk a short distance before the engine would stop.