RARE S-CODE BOSS 429*****
The Boss 429, also known as the "Boss 9" by enthusiasts, is
arguably one of the rarest and most valued muscle cars to date with
only 859 made in 1969.
The origin of the Boss 429 came about as a result of NASCAR as Ford
was seeking to develop a Hemi engine that could compete with the
famed 426 Hemi from Chrysler in NASCAR's Sprint Cup Series.
The Boss 429 engine was derived from the Ford 385 engine and used
four-bolt mains, a forged steel crank and forged steel connecting
rods. The engine featured aluminum cylinder heads, with a modified
Hemi type combustion chamber which Ford called "crescent". These
heads used the "dry-deck" method, meaning no head gaskets were
used. Each cylinder, oil passage and water passage had an
individual "O" ring style seal to seal it tight. The Boss 429
engine used a single Holley four barrel carburetor rated at 735 CFM
mounted on an aluminum intake manifold and an hydraulic lifter
camshaft.
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 nose
heavy. This was the first Mustang ever fitted with a rear sway bar,
and it notably handled much better than other big-block Mustangs of
the time, making it a very capable track car. It came fitted with
an 8,000rpm tachometer, and AM only radio. In addition, a hole was
cut in the hood, and a manually controlled hood scoop was added to
these cars. Other features included a front spoiler that was
shallower than the Boss 302 spoiler, color keyed dual racing
mirrors, and an engine oil cooler. It was also equipped with a 3.91
ratio rear axle with a "Traction-Lock" limited slip
differential.
The cars were rated very conservatively at 375HP and 450lb�ft of
torque. Actual output over the years was tested and stated to be
well over 500 horsepower. The manufacturers and dealers only listed
375HP because of legal issues and rising insurance costs so
customers would be lured into buying these cars without the stiff
fees from an insurance company.
Despite the high horsepower and torque ratings, the car was at home
in the high RPM range although it is limited to 6,200 RPM, it is
said to be able to rev up to 9,000 RPM for extended periods of
time, which is impressive given the engines massive 7.0L
displacement.
The BOSS 429 featured a toned down exterior, as compared to other
Mustangs of the era in that the only external identification of the
car were the Boss 429 decals on the front fenders and unique hood
scoop which to this day is the largest hood scoop ever used by
Ford.
To show just how special these cars were, they were given special
NASCAR identification that was placed on the driver's side door.
Each car was given a "KK" number which stood for Kar Kraft. KK
#1201 was the first Boss 429 and KK #2558 was the last Boss 429
made.
All BOSS 429s were manual transmission, and there was no air
conditioning available due to the size of the engine. Some early
cars were known as "S" code cars and as such had a slightly
different engine. These cars had magnesium valve covers, NASCAR
style forged internals, nearly no smog or emissions equipment and
are said to be more powerful than the later "T" and "A" code
engines which had the emissions related equipment to satisfy
government regulations.
This amazing example is Number KK1318, #117 of the 859 produced and
is an "S" CODE WITH THE NASCAR INTERNALS AND HIGHER HORSEPOWER
OUTPUT.
Finished in Wimbledon White with Black Deluxe Interior, this
beautiful 429 has only been driven 28 miles since restoration and
has been stored in a Mustang Museum. This all NUMBERS MATCHING BOSS
is beautiful and runs and drives great.
A MARTI report is included with the vehicle.
These cars are true collectibles and an excellent addition to any
collection.
Great lease rates and Financing also available on any of our
inventory!
Buy Sell Trade Consignments Welcome!
Please email
[email protected] or call
1-818-773-8181
