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 ...

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 ...

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 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 ...

The Mustang Boss 429 – affectionately referred to as the ... per minute fed the mighty but finicky engine. The ‘semi-hemi’ heads (the famous Blue Crescent) were sealed to the block with ...

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 ...

This will be the first official continuation of the legendary Boss 429 Mustang, which packed a 429-cubic-inch V8 built to take on the Chrysler Hemi engines that dominated NASCAR at the time.

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 ...