Ford 351 Cleveland

Mailbag: Ford Cleveland 2V vs. 4V Cylinder Heads

Q: I’ve found that many of the best intake choices for the Ford 351C are for the engine with 4V cylinder heads. What is the biggest difference between the 2V and 4V heads? I know the valves in the 4V heads are bigger, but what other differences are there? Can the 2V head be machined to 4V

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