Ford had plenty of muscle competing in the '60s horsepower wars with the legendary 1969 Mustang Boss 429 – a NASCAR-bred 375-horsepower behemoth built to take on the likes of the Chrysler 426 Hemi.

Based on the 385-Series engine family, the street-legal version of the NASCAR-bred big-block V8 was conservatively rated at 390 hp and made the Boss 429 'Stang one of the most potent members of ...

But the Boss 429 of the first year came in two flavors, the early-production S-Code motor, ... Back in 1969, the Cobra Jet High output 375-hp Ram Air engine was a $1,208.35 option, ...

The 429 was conservatively rated at 375 hp (380 PS) under the old gross power system, putting it well behind the 425 hp (431 PS) Chrysler quoted for the Hemi, but both engines were rumored to be ...

The original Boss 302 and Boss 429 models of 1969-70 were built for related racing programs in Trans-Am and ... for the 2012 and 2013 model years, equipping it with a 444-hp 5.0-liter V-8, ...