The BOSS 302 Registry


The BOSS 302 heads are known as "Cleveland style" heads as they are based on the head designed for the 351 Cleveland engine. As the 1968 Tunnel Port engine turned into a disaster, someone at Ford Engine Engineering got the idea to put a set of Cleveland heads on a Tunnel Port block and thus was the beginning of what would become the BOSS 302 engine.
heads1.jpg (14016 bytes) The Cleveland style head featured a staggered, canted valve arrangement. This provided more room for larger valves instead of the standard side-by-side arrangement.
heads2.jpg (13681 bytes) You can see the valves are canted in this picture.

Production casting part numbers:

1969 - C9ZE-6090-A or C

1970 - D0ZE-6090-A or B

heads3.jpg (10421 bytes) The BOSS 302 heads used some of the biggest valves in the industry.

1969 Intake - 2.23 inches, Exhaust - 1.72 inches.

1970 Intake - 2.19 inches, Exhaust - 1.72 inches.

Said to be "overvalved" for street performance.

heads5.jpg (37001 bytes)
heads4.jpg (32362 bytes) Here again you see a casting with a D1ZE part number. Parts made from tooling for the canceled 1971 BOSS 302.


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This page last updated: January 02, 2015