Vehicle Description
1970 Ford Mustang Boss 429 For Sale - California Boss, Numbers
Matching Engine, Fully Doc'd LMC is proud to offer for sale this
fine 1970 Calypso Coral Boss 429. The Boss 429, sometimes referred
to as the "Boss 9" by blue oval enthusiasts, is arguably one of the
rarest and most valued muscle cars from the era. In total there
were 859 original '69 Boss 429s then only 499 Boss 429's for the
1970 model year. The origin of the Boss 429 was as a result of
Ford's desire to compete NASCAR. Ford was seeking to develop a Hemi
engine that could take on the Mopar Hemi boys - the 426 Hemi
Charger Daytona and the Plymouth Superbirds - the monsters for Ford
to slay to achieve their desire to rule the track. NASCAR required
that at least 500 cars be fitted with the competition motor and
sold to the general public. The Boss 429 engine featured aluminum
cylinder heads, which had a modified Hemi type combustion chamber
which Ford called "crescent". The Boss 429 engine used a single
Holley four barrel carburetor rated at 735 CFM mounted on an
aluminum intake manifold. All these cars had the Hurst Competition
Shifter 4-Speed Manual Transmissions and the Boss was rated very
conservatively at 375 HP while actual output was believed to be
well over 500 horsepower. Mustangs' were simply too small to accept
the massive Boss 429 engine so Ford hired Kar Kraft of Brighton,
Michigan to modify existing 428 Cobra Jet and Super Cobra Jet Mach
1 Mustangs. Modifications included widening the shock towers and
extending out the inner fenders. The mounts for the front
suspension were chopped and displaced to create room for the block
and exhaust manifolds. The battery was repositioned to the trunk
and a stiff 3/4" sway bar was added to rear end to improve handling
since the car was now nose heavy. It was also equipped with a 3.91
ratio rear axle with a "Traction-Lock" limited slip differential.
In addition, a hole was cut in the hood, and a manually controlled
hood scoop was added. Other features included a front spoiler and
color keyed dual racing mirrors. �In short, all Boss Mustangs are
simply big block power with few options. These very special cars
were given NASCAR identification with a "KK" number that was placed
on the driver's side door. 1970, the second model year had very
minor changes and production was drastically cut back. Changes
included the mechanical lifter camshaft and an improved dual
exhaust system though rated power output stayed the same. The
biggest change were the five new exterior colors - Grabber Blue,
Grabber Orange, Grabber Green, Pastel Blue and Calypso Coral. This
Boss was built on December 11, 1969 at Dearborn and then went to
Soutar's Ford Sales in Barstow California. �This is what makes this
car even more special, as it is one of only a handful delivered to
California and factory equipped with the rarely seen California
Evaporative Emission Control System. �Open the hood with the fully
functional air-gulping Hood Scoop, which were all painted Matte
Black regardless of the color of the car, to find the Boss 429. The
engine bay shows correctly and is fully detailed with all the
production chalk marks, tags and decals. The numbers matching Boss
429 engine is connected to its RUG 4-Speed Close Ratio Manual
Transmission with the the Hurst Competition Shifter. It also came
factory equipped with a Code V 3.91 ratio rear axle with a
Traction-Lock limited slip differential. This Boss, representing
the rarest production year of the Boss, this California car has
received a top quality nut and bolt rotisserie restoration. �It
looks striking in the rare factory Code 1 Calypso Coral which has
excellent depth and beauty. These cars had just a very plain
external identification with only the White Boss 429 decals on the
front fenders behind the bright chrome Magnum 500 wheels mounted on
Goodyear Polyglas tires. This is the clean look that some fanatics
refer to as the look of a �sleeper'...no flashy racing stripes or
fancy chrome emblems to announce the power. The interior is what
you the expected from the Mustang of that year. The interior
features the Black Clarion Knit/Corinthian Vinyl Hi-Back Bucket
Seats. It �is in excellent condition with great chrome and step
plates. Even the restoration of the undercarriage reflects the high
level of the quality restoration and the extreme detail taken to
have this Boss present correctly. Marti Report also confirms the
other features: Drag Pack, Competition Suspension, Tachometer,
Convenience Group, PB, PS, Deluxe Belts/Warning Lights, AM Radio,
Wood-grain/Rim-Blow Deluxe Steering Wheel, Clock, Console and Dual
Color Keyed Racing Mirrors/Driver-Remote Mirror. Even sitting
still, this Calypso Coral Boss looks like a serious weapon for
either the street or strip. Overall the exterior and interior are
outrageously tame - all the wildness of the beast is kept under the
hood. This 1970 Calypso Coral Boss 429 is definitely a show stopper
that will appeal to any collector! Additional Details: 1970 FORD
MUSTANG BOSS 429 -
