The pipe which goes to the vacuum advance is 1/16". The fitting for that pipe in the carburetor has a 1/16" hole in it. Any variation from that design may or may not cause a problem.
I have 99 problems, but a too big hole ain't one. I wouldn't want to have one and always wonder if it is causing "that noise, or that stumble".
Carl

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission