Pertronix 1181 stock 72 350

[HO455]

The Pertronix will work fine with the factory coil and ballast resistor. You just need to supply it with 12v.

If you refer to fig 3 in the instructions it shows positive 12v power to the unit being hooked to the ignition switch side of the ballast resistor. We have a ballast wire instead of a resistor. Hooking the unit to the ballast wire will only provide it 8-9 volts which isn't enough for the unit to operate properly.

This means you will need to find a different 12v positive supply from the ignition switch. That provides power in the run and start positions from the ignition switch.

Or hook the 12v positive supply to the Pertronix to the ballast wire where it exits the connector on the firewall.

Or remove the ballast wire and replace it with regular wire and replace the factory coil with one that works without any ballast wire or resistor. And hook the unit to the 12v supply at the coil. That is how mine is hooked up on my Burban.