Quad carb setup information help

So after doing some Holley reading tonight I’m going to change my PV from the 6.5 to a 5.5. This should allow a quicker fuel dump opening.
Now j par. When you say add a larger pump shot are you talking about a nozzle change. If so do you drill larger or buy new. If not how am I to increase that pump shot?
I also want to get some blank air bleeds. I couldn’t figure out which ones to buy because McMaster car has so many to choose from. I think I’ve been told I will need some 6-32, 8-32 and 10-32 brass set screws. Does anyone no what numbers I need so I can drill them by hand?

This is going to be a fun ride. I want the car to run great and get the best fuel economy possible for what it is.
Thanks for all the help
Rod