HEI or Rev-N-Nator and several HEI questions

Even your factory coil with HEI gives you a hotter spark than the Mopar box, probably for a couple of reasons........the HEI does not need a resistor, and the HEI has dwell control. An added bonus of HEI, and again..........I'm referring to GM HEI and not some import deal, if you happen to leave the key in "run" with engine stopped, it does not draw coil current and heat up the coil