How And Why Move Emulsion Jets?

Thanks @TT5.9mag & @mderoy340 these are the conversations I copy and save to my phone for future reference. Much appreciated.
There is a lot of good information on emulsion tuning on a few sites if you search it.
racingfuelsystems-Emulsion Tuning
And
emulsion stack Holley Carbs
And
Holley Carburetor Emulsion - Don Terrill’s Speed-Talk

But in all reality getting in to your carb and making changes then driving the car to see how the engine reacted to the change has been by far the best way for me to learn.