Holley instructions contradicting on fuel bowl level ??

I too would not spend any money on new inlet valve until try adjusting what is there.

The large sight glass bowls, fuel level is about centered in the glass.
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Set the fuel level dry by turning the bowl upside down, adjust the float so its about level, that should get it ballparked.
In this photo you can see the casting line is about even with the bottom of the site plug.
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You are correct, I have the sight glass so fuel will need to be middle of window.

As for the needle. 2 things are going on. The size I found that was installed is .150, secondly the needle is fully seated on my secondary (seen in first post picture) and it's still flooding badly.