Leak in Carburetor

So I'm buying a Holley 1920 Rebuild Kit from Mike's Carburetor. Stock #K4093. I was told that the float 100-14, the nitrophyl float, will not fit. Mike's Carb does not have the other ones that will fit.

Walker products has a few floats, including the 100-14. The other floats are the 100-86, which is also nitrophyl, while the other float, the 100-39 is brass. Which of the two floats should I order from Walker Products?

My Holley 1920 Carb # is 6156 and its off of a 198 ci slant six.

https://buy.walkerproducts.com/carb...holley-1bbl-1904-4-carburetor-components.html