In January 1969 Ford Administration Service ordered 7 test mules in the Dearborn factory to be shipped over to Kar Kraft for a new exciting project - the BOSS 302. These pre-production BOSS 302 were all delivered as 351 Windsor (M-code) Sportsroof 69 models with VINs ranging from 9F02M148623 - 9F02M148629.
Smokeys exhaust manifold set-up from 'down under'
Nothing beats this set-up, I'd guess. Handfabricated art of an 3" exhaust organ that can be only played in the correct tune by a high-revving T/A engine.
Note the special separate 4-in-2 tube collectors and the double crossover draft tubes. Considering the thightness under a lowered race car, exhaust modelling without sacrificing highest possible flow stream for sure can be called an art in itself.
11,7" Kelsey-Hayes disc brakes from '69 Lincolns up front with cooling vent tubes were set-up with billet-machined hubs for the special 15" racing wheels.
Quick-rim-mounting was made possible with the extended center hubs and screw-on-style spinners.
The rear axle was fitted with 4-caliper 10,5" front disc brakes from 65 Shelbys.
This 4-disc brake combo made a stopping power of 80-0mph in only 180 feet possible, a mere 116 feet less than a later stock BOSS 302.
Kar Kraft also used very expensive C7AX-rear ends in the T/A cars that cost about 5.000 dollar. Smokey stated in an interview that all these things were just beautiful and probably around 20.000 dollar worth, but he was not really convinced of the parts to withstand a circle track race like in Talladega.
He pulled even the handfabricated parts and turned the transmission front cover so that the turned around starter allowed more room for the exhaust manifold.
(text passage sources: Alex Gabbard - Fast Mustangs and Dr. John Craft/Boss and Cobra Jets)
Exclusive on this site!
The Ford factory invoice of Smokey Yunick's Mustang!
9F02M148626 - Stamped to VVIN
The factory invoice - issued on 10th January 1969 reveals interesting details.
This is really an ultrarare piece of historic documentation. Thanks to Steve Francis for sharing it with us.
According to the Mustang Production Guide by Jim Haskell/Jim Smart the 7 cars were probably built around 14th. of January 1969.
Kevin Marti (www.martiauto.com) has some more on this from his Ford Files.
"Actually, it (the print on the invoice) was supposed to say "Delete all SEALERS . . .". It was a typographical error. Yes, all 7 vehicles were identical including the Rim Blow. The tinted rear window was standard in all sportsroof Mustangs in 1969. The 178-D-406 is the tag code for keeping track of the car within the Ford system for inventory purposes."
Thanks Kevin, for looking this up.
On Display at the Ford 100th.
Anniversary (Pictures thanks to Steve La Riviere - Mustangsandmore.com)|