The Ford Boss 302 is a high-performance "small-sized" V8 engine manufactured by Ford Motor Company. The original version of this engine was used in the 1969 and 1970 Boss 302 Mustangs and was constructed by attaching heads designed for the planned 351 Cleveland (which debuted the following year) to a Windsor engine block. The construction was aided by the two engines sharing a cylinder head bolt pattern, though the Boss heads had to have their coolant passages slightly modified.
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