Thanks , Neal Zimmerman Eugene OregonBTW is there a front door and a back door to a ballast resistor or does it not care??OK, it's getting close to fire up on the barracuda, . I wanted to double check how the previous owner had hooked up the Mallory Unilite set up, and ( surprise, surprise!) he did it wrong according to the mallory tech sheets. Amazing it ran. Anyway they say to hook in the red wire from their distributor to the 12 volt side of ballast resistor (with a little picture of a key and ignition switch), but according to my wiring diagrams, the dark blue wire from one side of resistor and the brown wire on the other side of resistor both run to the ignition switch. The dark blue goes to "1" on ign. switch and brown goes to "2" on ign switch.So which wire is the 12 volt side of resistor?? I have a feeling its the blue, but not sure.