1970 Mustang Boss

This Boss 429 engine was specifically made to compete in NASCAR racing. The rules stated that at least 500 regular-production models had to be available for sale to the public, but they had a small loophole that proved very convenient for Ford. The rules did not state that the regular-production model body and engine be built together, which allowed Ford to advertise and sell the Boss 429 engine in the Mach 1 body, but race it in the Ford Torino Talledega body.

For the street-legal models, 1,358 total 1969 Mustang bodies were delivered to the Kar Kraft factory in December of 1968 where they were promptly stripped of their engines and given reinforced engine chambers with extra space. They were given either a “T-code” engine or an “A-code” engine, the latter being far more rare with revised smog controls, then sent out for sale as  the new 1970 Ford Mustang Boss 429.