My voltage regulator was acting funny (it was the original, 40 years old), so I replaced it with a new one. The new one has the needle on my volt meter vibrating around 14 volts and the lights on the dash flicker when the car is idling (that stops when the engine is raced). I could not reuse the original rubber incapsulated nuts and bolts that secure the regulator to the radiator core support so I insulated it with rubber faucet washers. Any suggestions? Thanks.