In 1970, Ford began installing Hurst High Performance Shifters on Top Loader 4 Speed Transmissions. Hurst shifters were mainly used in special edition high performance models. These high performance models included the Boss 302, Mach 1, 428 Cobra Jet, 429 Cobra Jet and I believe even the Boss 429 manual transmission model.
These Hurst Shifters were offered as an aftermarket upgrade to the stock Ford shifter. They featured quick shifting, short throw shifters that were used with Ford heavy duty shift linkage. This combination achieved a quick shift engagement.
In 1971, 1972 and 1973, the Hurst shifter was used in the Boss 351, 351 CJ, 351 SCJ, and 351 Cleveland H.O. high output engine.