I remember seeing someone making a harness to help or modify the ignition switch wiring on a 6.5. We have a 6.5 that has been having "gremlins"- most recently, intermittent slow cranking of the starter, and it shut down at a stop sign. Thanks Sherri

 

I eliminated my ignition switch because replacement cost was too high in Canada.

What I did was get a constant run snow plow solenoid,a toggle switch and a starter bump button.

Then identified what wires from the switch did what and connected it all up-now the key only unlocks the steering wheel