Anyone use this?

Comments:
- not sure what 'no' HEI means, but you actually want HEI. While the term HEI is generally associated with the GM HEI, HEI means High Energy Ignition. You want a spark with a high energy content.
- the original 1974 HEI used a microprocessor, Motorola MC3334, so nothing new there.
- for $129 from Summit you can buy the MSD HEI module #83647. It is more compact, has a 5000-9000 rpm adjustable rpm limiter that is more accurate than above & switches 7.5 amps, 2 amps more than the stock HEI module.
- what does the above switch in coil current? The power [ energy ] in the spark is determined by current as one of the determining factors.