Take the yellow and resistance wire pair off of the coil and arrange them where they won't touch anything. Leave Pertronix as you have it. Install a jumper from battery positive post to coil positive. Make sure one end has a alligator clip for fast removal. It will be the only way to turn off motor. When jumper is attached, start truck. Ask any questions before starting, otherwise report what happens. BE SURE you are not out of gas in the truck.

I never got a battery reading with ignition off, across posts.

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