Sizing carburetor

agree

what you need it to do is key
Drag racing is a small and specific area where Bigger carb to the detriment of normal driving is better but its the only time you would do that. you choose and tune the narrow higher rpm range you use for 9, 10, 12 seconds. and at or near WOT.

For that you don't need a carb an angle cut pipe ending in the middle of the throttle bore with a restrictor and a simple throttle plate works for that kind of operations. they used to call it fuel injection....! :)

a bit too big, in any other circumstances and you will loose every time you are operating at part throttle.

the more oversized the carb is, the narrower and higher the rpm range it works properly at is.
until you add a band aid like an air door or vacuum actuator :)

A motor with a smaller or even a supposedly too small carb, will involve buying more jets and will involve more fiddling to get it to work properly. but when it works it will work brilliantly for 80% of throttle openings (the 80% you use on the street) and you will only see an impact of the greater restriction imposed on the motor due to the smaller carb as you approach WOT at the Highest RPM you run at. that rpm range will be restricted by the smaller carb.
airflow at all other RPMs will be faster, for the given RPM, so atomisation will be better, leading to better consumption and more torque and cooler running

WOT at lower rpm will produce plenty or torque, and the motor will be a pleasure to drive. because the restriction isn't truly a restriction when the engine doesn't need maximum air flow when its not at its maximum rpm.

an over carbed motor is in my opinion a dog on the street

Dave