Coil voltage high engine running

[Accelo]

You voltage is a little low. I would pull the main bulkhead connector and confirm the pins are not corroded.

You should have 12V ONLY during the starting phase but the voltage supply from that wire should disappear when the switch returns to "run".
Their are two wires at the coil. One is the resistance wire and the other provides 12V during starting.
This by-pass wire is necessary because without it the normally full voltage at the input side of the resistor would drop due to starter load during engine cranking and would result in even lower voltage on the out-put side of the resistor going to the coil, basically defeating the purpose of using the resistor in the first place.

So remove the second wire and check them both with the key on. One should read close to 8V and the other should not read any voltage. It has 12 volts only while the starter it running.
Let us know what you find.