For years, the '69-'70 Boss ... To battle the Hemi, Ford engineers designed a new engine, the Blue Crescent 429—what we now call the Boss 429. It wore aluminum heads on a cast-iron block ...

This past January, Ed Meyer set a world record when his '69 Boss 429 ... exotic racing Hemi with aluminum heads? See All 25 Photos For answers, we went to the recognized Boss 429 gurus: Bob ...

A rare 1970 muscle car just stunned auction watchers by selling far above value, despite never turning a single competitive ...

The 1969 Ford Mustang Boss 429, code-named ... Its cast aluminum cylinder heads featured crescent-shaped combustion chambers that some dubbed the semi-hemi. The heads use intake valves measuring ...

Everything a great Mustang should be -- style, racing history, and still-relevant performance. A blue-chip collectible piece of Ford history. The hairy-chested Boss 429's purpose was, in some ...

The FoMoCo bosses had learned the critical lesson they had served to Chrysler in 1965 when the Race Hemi got banned after Ford complained the hemispherical-heads ... A ’69 Boss 429, a ’71 ...

A fully-loaded Hemi ‘Cuda was recently put up on the auction block with a price of $1.3 million, and now, we’re seeing this Mustang Boss 429 going for nearly half a million dollars.

Produced over two years in 1,359 examples, the Boss 429 is widely considered the magnum opus of the original Mustang ... heads with counterclockwise valves that gave this engine the Twisted HEMI ...

While Chrysler installed the 426 Hemi in a variety of production vehicles, Ford shoehorned the Boss 429 into its 1969 Mustang. According to MotorTrend, the term "semi-hemi" more accurately ...

The 1969 Mustang Boss Boss 429's engine had many nicknames, a few of them being: The Blue Racer, The Semi-Hemi and The Blue Crescent. But only one seemed to stick, and, soon enough, the engine was ...

For years, the '69-'70 Boss ... To battle the Hemi, Ford engineers designed a new engine, the Blue Crescent 429—what we now call the Boss 429. It wore aluminum heads on a cast-iron block ...