Curious about which coil you're using with the Pertronix. My Mallory Unilite keeled over recently so I bought a Pertronix instead. Currently have a Mallory coil which measures 0.8 ohms on primary side, which is too low for the Pertronix (they say 1.5 ohms min). I'll use a ballast resistor, or the original resistor wire to add the required resistance, plus I stil have my stock coil if need be. I know the issue of the unit needing 12v and such, just curious if others have used performance coils with a lower primary resistance.