1970 MUSTANG BOSS 429
Shotgun 429
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For Ford to homologate the radical Boss 429 engine for NASCAR competition, they built limited numbers
of the Boss 429 Mustangs in 1969 and 1970. The Boss 429 was equipped with a forged steel crankshaft,
four-bolt mains, 735 cfm Holley four-barrel, aluminum large port high rise intake manifold and staggered
valve aluminum hemi-heads.  
To fit this big engine in the Mustang, the front suspension needed to be moved outward by two inches which
widened the track and actually improved the handling of the car. An outside contractor, Kar Kraft, located
in Brighton, MI handled the final assembly of the Boss 429 Mustangs.
The specialized assembly process and the exotic engine boosted the sticker price up to almost $5000. Quite a
sum of money in the '70s. Today, the Boss 429s are among the rarest and most sought after Mustangs ever
produced by Ford. They're selling at auctions now in the $200k+ range!
I added plug wires with the correct firing order, fuel lines and heater hoses. The kit Magnum 500 wheels and
tires were used. Exterior is finished with authentic Grabber Blue, sanded and polished. The engine block was
finished with authentic Ford Engine Blue from Model Master. Bare Metal Foil was used on all exterior
chrome trim. Since the stock Boss 429 didn't have chrome valve covers, they were stripped and painted silver.