Kern Dog said This is the ballast resistor I got from a NAPA store. The application? 1970 Charger with a 318. View attachment 1716291450 Fifteen bucks. Cold, it tests at .7 ohms. View attachment 1716291451 I'm told that once it warms up, that number should read .5 ohms. I haven't tested it hot though. Click to expand...