One other comment for the OP, who asked about a rebuilt carburetor:
Jerry offered the following comment: "RUN- - - -do not walk away from a "rebuilt" carburetor. They're assembled from a bunch of mismatched bits and pieces and the odds of getting a good one are approximately equal to finding a chicken with lips."
To this I would agree, if buying a "rebuilt" carb from your FLAPS, although I use a different analogy, that of having a better chance of winning an argument with the IRS

But our hobby has specialty shops including carburetor rebuilders (this is not an advertising plug, I quit restoring carburetors due to the explosion of our rebuilding kit business some 8 years ago), that CAN correctly rebuild many carburetors. I used to offer a 5-YEAR warranty on those I personally rebuilt, and only had to honor it once (but then I was selective in which carburetors I would rebuild, and the B was not on the list

)
There are a number of folks that can rebuild the various Carters (I might suggest the other Jon on this forum). I have not personally inspected his work; but I I have seen pictures and seen his comments, and would certainly give him a try if I needed a Carter rebuilt.
Maybe the moderators could start a "sticky" thread with "Jerry analogies"; they are generally good for a laugh.
Jon.