Looking for the bright blue light (air fuel mixture)

I have about two weeks of groceries on hand and no where to go but to my garage.
I am not looking for the spiritual bright blue light, but am looking instead for perfection in setting the air fuel ratio. Perfection for a 50 year old points ignition, 2bbl carburetor may be a stretch, but dammit I am going to try.
Back to the blue light.
As some of you may have seen in another thread...

Looking for the bright blue light (air fuel mixture)
Author: HWYCRZR