The first thing to do is to determine what carburetor is on your 1949.
It came with a Carter type W-1 identification tag number 684s.
This link will help you to determine what you have:
Carter W-1 identificationIF you have the 684s, then you have another question to answer. Is this going to be numbers-matching for show or a driver.
If numbers-matching, check your wallet before sending out the carburetor, and then "bite the bullet" as it is said; cost will be about the same as restoring a Corvette dual (2 4-barrel) set-up. The reason is that many parts, including the accelerator pump, in the 684s are simply unique, and literally must be fabricated by hand.
If a driver, consideration for a replacement Carter YF is a least something to think about. A new old stock YF or a fully reconditioned YF is going to be significantly less than having the 684s rebuilt.
Another consideration might be for a 1948 carburetor, the Carter type W-1 574s. You will lose the "faster idle" when pulling the choke, nothing else.
Jon