The chart in the link below will help you determine what CARTER recommended for your application:
http://www.thecarburetorshop.com/Carter_YF_Chevrolet.htmBack in the day, Carter, Stromberg, and Zenith all produced replacement carbs for the Chevrolet.
Additionally, many other carbs have been adapted, with varying degrees of success.
And today, there are some offshore clones available. And while I have not personally inspected the offshore clones for the Chevrolet, I have had a number of customers try the offshore clones for the Willys Jeep and the Ford 8N tractor, often sending them to me for rebuilding after about 25 hours of use. They were not rebuildable. These two "carbs" are extremely useful if one has a strong right arm (or left arm, no discrimination here) AND a rabbit problem in one's garden!
All products have advantages and disadvantages. The clones we inspected had two "advantages": (1) initial cost was ridiculously low, and (2) they were new and shiny. We do suggest if buying them to use, buy them by the dozen!

Jon.