Once the float is sitting flat with the top upside down so we can see where it is resting, there should be 1-9/32" from the very top of the float pontoon to the gasket. They supply a measuring square with the Carb Kit. These are important measurements, so be sure you understand what you are reading. To change that measurement, very delicately bend that center tab in or out so when it sits on the needle valve, you get the proper measurement. Next, turn the assembly upside down and let the floats dangle. Now measure from the gasket to the top of the float pontoon and you should have exactly 1-3/4". If not, there is another tab that is bent for that in the center of the assembly.
That was out of this document which describes the whole rebuild process:
http://devestechnet.com/Home/Project1959235
