12v to the one marked batt. Nothing to the tach. I will put dedicated grounds and scrap the jumper cables. I don't have a timing light so the method I uses was to drill out an old spark plug put a long and as wide bolt as the drill bit to make a stop stud and screwed that into #1. Hand crank it until it stops on the bolt. Make a mark. Turn it the other direction until it hits the bolt. Make a second mark. Then the distance between those 2 marks is my too dead center. Does that method work? Then I insert the distributor with the rotor pointing to #1. Then make the the coldest one on the cap the #1 spark plug and wire. Then counter clockwise following the firing order. That sound ok?