[1795]

One of the most critical things you have to do is make sure that the linkage it tight (no slop) and pulling equally. You can only do that once the carbs are installed on the engine and it is all mounted in the car. Bench testing will get it close, but you have to have it in the car and pulling on the throttle pedal to fine tune the linkage. Any inconsistency in the throttle assembly will cause a lot of grief and you may be chasing the wrong problem (i.e., changing chokes, jets, etc.).