Throwing my hands up on this ignition!

toolmanmike said

I can see the benefit of CDI especialy with high compression. The multispark seems to work at lower rpm and a street application could benefit. I see Summit has a multispark set up. Who knows who makes it for them though.

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Biggest benefit of MSD type Ign, is cars with manuals are much harder to stall at low throttle. Also systems that run leaner A/F ratios can see improved performance sort of. An old friend of mine had a 340 4speed in an E body with an MSD that was dam near impossible to stall out. He could side step the clutch from an idle and it wouldn't die, it would just lurch with a chirp of the tires and go.