I am going to change out the stock ballast resistor on my dart for one of the msd units and see what the voltage is to the plugs. Right now i am showing about 5 volts with the current setup, factory electronic distributor with chrome ecu and msd blaster coil. Seems there are various opinions on the use of a ballast resistor. Could just jump the terminals of my current resistor and see if the coil becomes smoking hot.