Understanding the 4300: Identified as one of Ford’s most befuddling carburetors, the Autolite/Motorcraft 4300 can be tuned to perform Most of us agree the 4300/4350 carburetor can be a real toilet ...

So you think you know how a carburetor works? Let's find out. Can you detail the major players in the idle circuit? What part does the power valve channel restrictor play in the main metering circuit?