I installed the HEI distributor. it has a larger red wire and a green wire that clips into the top of it. because the red wire was a larger gauge wire I did not use the wire from the original coil. I have it on the "extra" post on the back of the switch. it is on in the start and run position.. the alternator is a 3 wire alternator that was on it when I got the truck. the PO did not attach the terminal 1 wire to anything. I like the idea of routing it to the solenoid but you said put it on "R" so that alternator is charging while engine is cranking. what about while it is running? wouldn't the alternator not charge during running?