Electronic ignition upgrade.

Mattax said
"Internal Combustion Engines and Air Pollution" by Edward F Obert

You can also read the various snips from Obert, Larew, and Taylor that Tuner and Shrinker in particular have posted and explained on a few forums, which some of us here have referenced in the past.

https://www.tapatalk.com/groups/rac...tor-afr-characteristics-at-differen-t421.html
https://www.tapatalk.com/groups/racingfuelsystems/air-bleed-characteristics-t80.html#p4192
https://www.tapatalk.com/groups/rac...dvance-at-light-throttle-t666-s40.html#p16486
https://www.tapatalk.com/groups/racingfuelsystems/too-much-advance-at-light-throttle-t666.html#p5625
https://www.forabodiesonly.com/mopa...carb-tuning-assistance.441854/post-1972617087
https://www.forabodiesonly.com/mopa...-and-2x-different-cars.559646/post-1974649521
https://www.forabodiesonly.com/mopa...boosters-cant-beat-afr.455547/post-1973324946Of course some people think that those old books are outdated because engines now work differently. The funny thing is those guys had to make engines work well with the mighty spark of points ignitions, and couldn't try to hide timing or combustion conditions with a flamethrower ignitions. :)

The ones that get me are the ones who call the MP manual dated and obsolete. Those recipes in that book worked 50 plus years ago and they still work today, just as printed. They'll work 100 years from now if we still have internal combustion engines. 10 seconds is 10 seconds, regardless of how you get there, right?