As Hot Rod said, you will not find an after-market coil that works but you can ‘Fake It’. I used an after-market coil. Cut off a short piece of exhaust pipe that fits inside the coil cap. Grind open the other end a bit and epoxy onto the bottom (top?) of and after-market coil. Use file, Dremel, etc. to duplicate the coil cap locking slots of the original coil. Drill a small hole in back side of exhaust tubing to rout primary ignition wire down the back side of coil where it does not show. I did this so that I could keep the original look with an after-market 12-volt coil.
