That looks like a late model Rochester B. The tag that's barely visible under all the crud, under one of the bowl cover screws will have a number on it that will identify exactly what the carb is, including its original application. Copy the number down and take it to any competent auto parts professional- - -preferably one who is gray haired or bald, who actually remembers what a carburetor is. He will be able to order the correct repair kit. You're in luck- - - -most of the time those tags have disappeared about the time Noah strolled off the ark!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!