Streetspark/DC ignition?

That was the basis for dual points: increased dwell time which allowed higher rpms. Overnight, the GM HEI in 1974 made that system obsolete. It had, as do other elect ign systems, other benefits as well:
- no rubbing block to wear & retard timing
- no points to arc & change timing/cause misfires
- no points to bounce & cause erratic timing