Do a search on this site, I and others posted some years past, the sizes of the spacers,----- but thinking you mentioned you have them?
As far as wiring harnesses:
You want the one that does not have a power wire to a coil as the magnums have a magneto on the engine head,-- no separate ignition coil.
And the ignition switch will have an "M" terminal. for the magnum.
That is connected to a small brass piece that is crimped on the switch zinc housing.
When the switch is turned to "stop/off" it grounds the magneto using the "M" terminal to stop it.
The wire that exits the harness near the voltage regulator 3 prong plug will have a white wire going to the magneto kill wire.
That white wire comes out of the grommet on the fan housing between the spark plug wires.
hope this helps
follow the wiring diagram while ringing out the wires to assure the correct wires go to the correct terminals/connectors
Are you having fun yet?
