I have a 66 C code. I put an original 4 barrel cast iron intake on it and rebuilt a used 4100 carb. When I took the carb apart to rebuild it was lacking the small bearing which regulates the vacuum for the secondaries. I found a bearing that seems to fit but its not made for that carb. The car runs but the secondaries will not open unless you help it. When the motor is not running the secondaries open and close with ease, but when the motor is running it feels like the vacuum is holding the secondaries closed. Does anyone know what size that bearing is for the secondaries? The motor runs like it has a vacuum leak. I checked for leaks and found a few, but there was very little improvement. I can't afford to send carb into pony carb, so I have to do this myself.
Thanks
