MSRP on the 1969 Ford Mustang Boss 429 when new was $4,087 (equivalent to around $28K in 2014 dollars). It was the most expensive non-Shelby Mustang you could buy.

Powering this Mustang is, of course, the iconic Boss 429 engine, which had a factory rating of 375 horsepower and 450 lb-ft of torque. This thing had just as much grunt as a Nova Yenko S/C.

Hence, in 1970, the Boss 429 sold just 499 examples. How many are left today would make a nice detective investigation, and each one’s history could fill up entire sections of an automotive library.

And that's exactly how we first spotted Keith Clark's Boss 429. We were at the Mustang Memories All-Ford Show in Dearborn during the Week on Woodward Road Tour when Keith rumbled onto the parking ...

A gorgeous 1969 Ford Mustang Boss 429 that hasn’t been touched in nearly 40 years had just been listed for auction on eBay, according to Road & Track. Despite having not been driven for decades ...

The 45th Boss 429 in a batch of 100 built by Ford's subcontractor Kar Kraft, this Boss had been known to Mustang expert Ed Meyer for the better part of 20 years. Having heard rumor of its ...

The Boss 429 needs no presentation, but did you know that this older, more obscure Ford model will leave the famed Mustang in ...

However, when you consider that an original 1969 Boss 429 sold at a Barrett-Jackson Auction back in 2015 for $550,000, the continuation 1969 Boss 429 sounds like a relative bargain.

Prices will run from $169,000 for the Mach 1 and Boss 302 to $209,000 for the Boss 429. Not cheap, but the last of those is a bargain compared to what vintage Boss 429s are going for these days ...

Some 857 '69 Boss 429s were built—or 858, depending on your source—and just 498 '70 models were finished—or 499, again depending on who you believe—before the Boss 429 program ended.) ...

To the casual observer, the color is the main attraction of Rick Parker's beautifully restored '69 Boss 429 Mustang. Boss 429s look bad in black. But Rick looks at KK1220 with an educated eye ...