63 4 speed carb

The manual transmission cars have a vacuum port on the carburetor for the vacuum advance on the distributor where the automatic cars did not have this port. The automatic cars vacuum advance hooked to the intake manifold port. They also had a manual choke instead of a automatic choke.
Looks like you are new? Do you have a Jetfire?

OK, thought we had someone new. For the most part nothing is different as far as manual goes. In general, for all 62 verses 63 carbs, the 62 has a smaller jet and smaller needle, the 62 has a fresh air port (not vacuum) that hooks to the throttle retarder, the 63 has a “tower” on the float cover that is for the vent. I am assuming that they found gas splashing out of the 62 non tower vent? Other than that I don’t think there is any difference. I upgraded my cars to the 63 jet and needle. Actually, I modified my wifes throttle body and flows more air. to get it rich enough off idle I went to the 63 jet and 62 needle. As soon as my car is done I am going to build her a new stock carburetor with the 63 jet and needle.