Few rivalries in American automotive history are as storied and intense as that between Ford's Boss 429 and Chrysler's 426 Hemi engines. The big-block powerhouses epitomize the pinnacle of ...

In the truest sense of the word, no automobile engine actually has a fully hemispherical combustion chamber. However, ...

In response to Chrysler’s racing 426 Hemi engine during the 1960s ... was capable of nearly 400 horsepower, Ford built the improved Mustang Boss 429 to take dominance away from Chrysler on ...

The performance-focused and off-road-ready prototype sported a blueprinted 1969 GT 350 Shelby engine ... The Mustang Boss was either a 302 (4.9-liter) or a big-block 429. When Ford revived ...