Ignitor III has 2 extras vs the Ignitor II, rev limiter and double strike. The ignitor III will spark twice throughout the whole rpm range. Ignitor II and III are used with the Chrysler single point aluminum distributor. The Ignitor I are for dual point presolite distributors.

Alway use the flamethrower coil (different ones for each model of Ignitor) and bypass the ballast.

The Ignitor I, that I use (for dual point presolite distributors) the phasing was terrible!