The Boss 429 has become the Mustang equivalent of fine art ... This wasn’t your average big block. It featured aluminum semi-hemispherical heads, huge ports, a forged steel crank, and a Holley ...

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 ...