In the late 1960s, the Boss 429 was born out of the necessity ... including the Mustang, GT40, Maverick, and a lot more.

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 ...