I recently acquired a 1985 Dodge D-100 and the ignition switch and wiring is missing. I need to find the wiring diagram or info on what to replace so I can use a toggle switch and push button to get it started. Any help greatly appreciated.

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Zip Code Entry at PartsAmerica.com (http://www.partsamerica.com/productdetail.aspx?MfrCode=GPS&MfrPartNumber=S78&PartType=410&PTSet=A)