I want to thank everyone that contributed to this thread. I am now convinced that I have the correct cowlings. I must have the wrong carburetor. I did some research using my various parts manuals and I have noticed that based on the part numbers of the upper carburetor body 1954 through 1956 the part number is 375973. Starting in 1957 through 1962 the upper carburetor body part number changed to 376978. I must have the later carb on my 1955 motor.
