The most desirable are the ’69 models with the S-code 429 ... and headers, this engine could go toe-to-toe with anything coming out of Mopar or GM. Even today, Boss 429s that get dyno’d ...

Alex Myrman emailed about his Rare Find, a '69 Boss 429 with less than 10,000 miles ... was replaced in the early '70s along with having headers installed. I could also see from some photos ...

What we all know now, is that the Boss ... 429 for hot street and strip use, with one of the more detailed efforts as follows. Hi-Performance CARS magazine ran an enlightening story in their 11/69 ...

Certainly the '69 and '70 Boss '9 Ponies are a ... rpm with Ford's updated mechanical cam and dyno headers, Car Craft concluded "the Boss 429 is touted as a performance engine, but dyno figures ...

the 1969 Mustang engine bay's small dimensions required a restrictive intake manifold and exhaust headers. Ford updated the Mustang for the 1970 model year, making subtle changes for the Boss 429 ...

A ’69 Boss 429, a ’71 Boss 351, and a ’71 Mach 1 - tucked away from humanity for a solid two decades or more somewhere in Glen Rose, Texas – have emerged with great potential for restoration.

As you can imagine, the Ford Mustang Boss 429 was part of that bracket, both the 1969 as well as the 1970 model year car. The ‘69 Boss 429 had to go through the 1970 Ford Torino GT Cobra in the ...