Rare Boss 429 Crosses The Auction Block Next Month!

[solarite_guy]

By Harrison Noble March 08, 2018

http://www.fordmuscle.com/news/clean...enagers-dream/

Great photo of the car:
http://cdn.fordmuscle.com/image/2018...6-1440x670.png

NOTE: There are some technical inaccuracies in the article (I'm so surprised), however, the commenters corrected those errors. So against normal practice I will include those comments at the end of the article.

Boss 429s are some of the rarest Blue Oval pony cars ever to exist, and this low-production-number example is no exception. Finished in its Royal Maroon hue, this 1969 Boss Nine wears KK no. 1390, which means its a February-built car. It was the 189th example produced, making it an ultra-low production-number model.

According to the original Mecum Auctions (where the car will cross the block next month) listing it is one of only 279 equipped with the rare 820-S NASCAR solid-lifter engine and smooth chin spoiler. The dark-red Boss 429 features a numbers-matching 429ci V8 filled with the familiar forged pistons and steel crankshaft. As if boasting low-production-numbers wasn’t enough, you can add one of 132 produced with these paint and trim options to its rarity roster.







What’s more is that the factory-installed smog pump is still installed, along with a dual-point distributor, factory exhaust manifolds and a Holley carburetor. The Boss hasn’t been tampered with much either, seeing as the 1969-specific, 3/4-inch rear sway bar and transverse mufflers are still present, only adding to the value of the one-of-a-kind ’Stang.

A unique KKX competition suspension resides under the body of the Boss and handles all of the power being transmitted from the factory four-speed manual transmission and 3.91 Traction-Lok differential. Of course, having power steering and front disc brakes doesn’t hurt either. Make no mistake folks, this Boss is sure to sell for big bucks come April 5-7 at the Mecum Auction in Houston, Texas.

My Note: This link is well worth following. A gallery of more photos.

http://www.fordmuscle.com/photos/auc...ck-next-month/

Comments:

Gary Woodruff · Sexton
Harrison just a little correction on your article about the red Boss 429,all S motor cars had hydraulic valves until KK1441 or there abouts no one knows for sure exactly the distributors were all single points. I WAS THE ORIGINAL OWNER OF KK 1349 the 26th Black Jade car built, only used it for street racing those 4:86 gears made for a lot of shifting.Of all the cars I have owned the Boss was my favorite. Gary

Steve Lovellette · Works at Self-Employed house/rolling stock maintenance...
Gary, I too was an original owner of a '69 (don't recall KK #). Mine had the hyd. cam and I switched to the mechanical version soon after purchase. Same change with the gear ratio. I also added an 850 cfm Holly, tube headers (what a job to install!) and light weight valves (NASCAR take-offs from H&M); had to cut down the dia of the intakes to fit street head.

Juanito Ibañez · Law Enforcement Instructor at Retired
While not mentioned above, the 820-S engines were also equipped with the "cross-drilled" steel crankshaft and super heavy duty 12-point, ½ inch dia. "through bolt & nut" NASCAR connecting rods, 6.549" in length -- which were omitted in the 820-T engines.

My Conclusion Notes: I am glad there were intelligent commenters to this article. Even still, not all of the differences between the T and S engines are discussed and in all honesty I couldn't rattle them all off. That said, there was a significant performance difference between the T and S versions of the BOSS 429, like about a second and a half in the 1/4. That may have been due to longevity concerns about the infamous exhaust side rockers.

I will take the liberty to note, baring the Shelby's, the appointment of this particular example ranks in my all time top 3 of Mustangs. Same exterior color as my '69 Mach I, but I had the burgundy interior.

All in all this article put a smile on my face.