The 1971 Mustang Boss 351 was one of Ford's last true muscle cars ... The only option for the rear was a Traction-Lok 9-inch with 3.91 gears, but the transmission was available in both wide ...
The power was sent through a six-speed manual to a 9-inch rear and was good for an 11-second ... 4-DOOR PONY CAR Ford called it the Mustang Boss 351, but only the one car was ever built and ...