are you converting or has your truck already been converted to 12 volt? That would be the only reason that I know of to need the separate starter switch.
About the wire from the ignition to the alternator without continuity? this may be a stupid question but did you have the key on when testing, and also try it off. It may be that the screw terminals on the ignition switch don't match what you thought. Like I said my alternator wiring was all messed up because of the external regulator so I am not sure what should go where.
David
P.S. being a fellow woodworker have you given any thought to wooding up your truck. I know a lot of the purists will be upset, but I am making wood panels for the doors to replace the cardboard ones, also I think I will try wood sunvisors. I think this will all compliment the wood bed. Just my thought.
