edelbrock carb question

It's in the instructions. Basicly, your bending the metal arm the float hands of and the rest stop on the other end of the arm. The measurement is taken from the bottom of the float to the air horn base. This is done inverted aka upsidedown, so the bottom of the float becomes the top and measured to the (Now) floor of the carb cover (top of carb) the side that mates to the base/main body of the carb.

Read instructions for best results. Trust me.