Distance from Air Filter Above Carb to Carb Top??

Thank you. I am most concerned though, with a filtered lid or a flat panel filter directly above the carburetor. No perpindicular flow at all. I am wondering how close to the top of the carb horn/vent/etc can it be - is there a distance.

I have seen the Engine Masters show with the filtered lid and the rest of the air cleaner assembly taped off made the most power along with the salad bowl.
I see, well, I’d simply get as much as I could within reason. How close is bad? IDK