Frequently Asked Questions

Yes you can. You must use the points/amplifier (white wire) input on the box. We usually don't recommend using ignition boxes because there is no performance benefit and it is more wiring and expensive. 

We recommend coils with a primary resistance less than 1 ohm. Most aftermarket high performance coils are fine. The distributor will automatically adjust dwell  for the coil you use. Some examples are- MSD Blaster 2, Pertronix Flamethrower 2. For more modern square coil we recommend the MSD Blaster SS or FAST i91.

Any car that came with a points distributor will have a resistor wire or ballast resistor in the ignition circuit. GM usually put the resistor wire in the engine bay between the  firewall plug and the coil +. Ford usually put the resistor wire in the interior, under the dash between the ignition switch and the firewall plug or factory tachometer. Ford continued to use resistor wires up until the mid 1980's. Checking the voltage at the coil + with the engine OFF will NOT tell you if there is a resistor wire. The coil is not charging, therefore there is no voltage drop. Start the engine and measure the voltage at the coil + and then measure at the battery. The voltages should be exactly the same.  For example, if you see 13.5 volts at the battery + and 12 volts at the coil+, there is a resistor wire powering the coil. A digital voltmeter will show an AVERAGE voltage. In reality, the voltage is dropping from 13.5 to 7 every time the coil charges to make a spark.