While both 429 engines offer the same displacement ... free-flowing intake and exhaust ports and Ford's take on the hemispherical combustion chamber design. The Boss 429 was designed for high ...

In the truest sense of the word, no automobile engine actually has a fully hemispherical combustion chamber. However, according to the looser hemi definition, the Ford Boss 429 engine is ...

That couldn't be truer than with the legendary Boss 429 Mustang and the semi ... The biggest difference is the combustion chamber de-sign. The original Ford head got its semi-hemi nickname from ...

Like numerous other engines ... Boss 429 design, but with subtle improvements that help make them stronger and, of course, fit the 460 block. The biggest difference is the combustion chamber ...

Introduced in 1969 to homologate the 429-cube engine for NASCAR ... their semi-hemispherical combustion chambers, large ports and valves, increased compression ratio, and big exhaust manifolds ...

To homologate a new engine destined for NASCAR use, Ford decided to squeeze it into ... and aluminum heads that stood atop combustion chambers with an innovative semi-hemispherical design.

That couldn't be truer than with the legendary Boss 429 Mustang and the semi ... The biggest difference is the combustion chamber de-sign. The original Ford head got its semi-hemi nickname from ...

Ford unveiled the Boss 429 in 1969 after NASCAR ... valves cut in on the hemispherical chamber-were practically junk but also the prize of the entire engine. By far the most manhours involved ...