Need more info. Foot stomp start? Trying to use original switch?
Crawl underneath? Pull switch from dash and let hang to see and wire it.
Check the Tip Section here on Stovebolt, here is one:
http://www.stovebolt.com/techtips/12_volt_conversion.html
If you are unsure about switch, take it to bench and do a continuity test to see OFF ON (ACC.), IGN is "ON" position with a foot start.

Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn