changing from points to electronic
I thought the HEI modules adjusted the dwell angle as a function of RPM, like newer computer controlled ignitions. (Then again, the HEI module I'm using myself is a later computer controlled type - I'm not 100% sure if earlier ones have this function.) However, their dwell angle is for a specific coil, so this does not get around the fact that you're not supposed to pair a HEI module with a stock Mopar coil and no balast resistor.