As a general rule on newer carburetors, for setting Zenith carburetor floats, Zenith's suggestion was that if a new float and new fuel valve were used, the float would be correctly set.

However, in 1957, Zenith did publish a guide for VISUAL CHECK ONLY for floats on older carburetors. Here is that list:

https://www.thecarburetorshop.com/Zenith_float_settings.jpg

Remember, NEVER bend a Zenith float for adjustment. If the dimension is incorrect, then adjust by changing the thickness of the float valve seat gasket.

Jon.

Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
If you truly believe "one size fits all," try walking a mile in your spouse's shoes!
The Carburetor Shop