I have a 65 Ford Galaxie 500. I am putting a stock 65/66 289 in it. The motor either came out of 66 Custom or maybe a Mustang. The distributor is an old points style. Do I need to run an ignition resistor? The voltage at the + terminal on the coil(with the key in the on position) is around 12V. I assume that if needed, the resistor goes on this side of the coil?