However, according to the looser hemi definition, the Ford Boss 429 engine is considered a hemi design. Of course, Chrysler ...

Interestingly enough, the Boss 429's cylinder heads were semi-hemispherical ... similar to the Hemi 426 but with Ford's ...

Is this the rarest Boss? An all-aluminum Can-Am 429ci. Tasca Ford owned the street with this car. Bring on Hemis and SS 396 Camaros. As one of six pre-production 1969 Ford Mustang Boss 429s ...