[cleszkie]

Make sure you are sending a full 12 volts to the HEI. If you use the factory power lead that your truck came with, you will be sending less than 12 volts since the factory wire was a resistance wire designed for use with the points system/ballast resistor. The HEI will run for a while with the lower voltage, but will eventually fry the module and/or the cap and rotor itself. Ask me how I know...