The difference between Mustang engine bays, for a 289 or a Boss 429

The difference between Mustang engine bays, for a 289 or a Boss 429

Taken from close to the same view angle, these are a terrific aid in determining all the mods that Ford had to do to shove a 427, 428, or 429 into a early MustangThanks to Ed for the photos!

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