I prefer the brass floats- - - -yes, they leak on occasion, but the plastic ones get fuel saturated and don't exert enough pressure on the needle valve to overcome fuel pump pressure. Floats have two adjustments- - - -"float level" which sets the upper limit of fuel in the bowl, and "float drop" which keeps the float from bumping the bottom of the chamber under periods of high flow- - - -full throttle passing, etc. The new design float will probably need some attention to assure that the float drop setting is correct by bending the long tab. Both adjustments are important. A too-high upper limit will cause flooding, or possibly running rich due to the fuel level in the float bowl being too high in relation to the venturis.
Jerry
