Screwed up Carb

Okay so I disassembled and cleaned my 1920 Holley Carb but I screwed up. The only thing I adjusted was the float level.

What drill bit can be used to adjust it correctly?

Also How do I know if the metering hook is in the right place?

The metering block passes through the throttle body and hooks into a plastic cam that cam is connected to a metal hook and the other end of the hook has three points it can be placed into.