Matt, I'm not familiar with that engine, but I would get creative with some soldering on the brass float to make it work if I where you. Tecumseh brass floats have all but dissapeared and are now plastic. A Briggs and Stratton brass float from a downdraft carb might be able to be adapted as well. If you can I advice making a brass float and ditching the cork float as you will have constant problems with the cork. The trick is to get the tang set so the float sits level when it shuts off the fuel.
Greg,
I was mistaken, Zenith was the manufacturer of the Carb in question....
http://s60.Rule #2/user/mdlbldrmatt135/media/Generator related/mil_std_engine_carb.jpg.html
I managed to locate the Gov't drawing of it.
saw horses made of that you trust them to hold your precious wood stock pile??? 


