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Transmission swappers beware! The '62-'65 transmission mount bolt holes are 4-inches apart (right). The redesigned extension housing used on '66-and-up 727s (left) is drilled differently (213/16 inches) and requires an A-Body mount when swapped into a pre-'66 B-Body. Notice the integral cable-operated parking brake assembly and different speedometer cable position of the pre-'66 housing. In 1966, Chrysler redesigned the extension housing (and main case) to move the parking sprag assembly inside the main case. This eliminated the need for the separate and confusing in-car parking sprag control lever used in automatic-equipped Mopars since the '50s. The '66 redesign directed all transmission control functions to a single column or console-mounted lever for simplified operation. But we still dig those push-button controls!