[6t8stang]

Check the two thin, black wires coming out of the MSD ignition box behind the passenger dash. If they are connected to the main wiring harness, pull them out, crimp or solder a ring terminal, remove one of the bolts securing the MSD box to it's bracket & insert the ring terminal when bolting down again. This is all of course assuming you have a similar setup with the MSD box, etc as I do on 436.