"First understand that a points type ignition system in proper adjustment is totally adequate for RPM's to about 5800. The after market multi-spark ignitions may make a marginal engine start and idle better, but generally will not improve actual acceleration performance. That is providing that your stock ignition has factory or equivalent parts and that it is properly adjusted. The HEI ignition system was developed to fire a wider spark plug gap which allows the use of leaner fuel mixtures. Leaner mixtures reduce pollution and improve emission control. The HEI also eliminated the need for points/dwell adjustment. The aftermarket ignitions claim better performance at higher RPM but most work no better than the HEI in our street/strip vehicles.
What is important is to get an adequate spark to the plugs at the correct time".
