273 cylinder out

krazykuda said

You could put any year 318 heads on a 64 - 65 273 and then you can use the 'standard' intake manifolds... The heads are interchangeable...

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I assume you meant 273/318 heads. I would be extremely unhappy if I had an engine with a 64 head and a 69 head, or even had 69 heads on a 64 273. They might bolt on, but should be done in pairs. Your and my idea of interchangeable are different.