Holly 1920 carburetor adjustments?

... And you should not rev up the engine right when you start it -- that's bad for it.
Definitely. In my wife's developing country in Asia, people start a cold engine, then rev it for 30 sec at 3000 rpm in N, then drive up and down the street real fast. Then it is ready to take the family out. Perhaps a mystical idea about waking the mechanical gods. I cringe whenever I see that. Any wonder why their cars only last 2 years. Many clueless gomers like that in the U.S. also.