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 ...

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 ...

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 ...

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 ...

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.

The Ford Mustang ... Boss 429's cylinder heads were semi-hemispherical, featuring a crescent-shaped combustion chamber design ...

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 ...

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 ...