Mopar 727 transmission

The Torqueflite transmission with the aluminum case was introduced in 1962 and continued to use the push-button cable operated shifting mechanism. The 1965 model cars used both the push-buttons and column mounted shifters.

The 1965 model cars DID NOT use pushbuttons at all. The confusion here arises from the fact that '65 cars used a dual-cable shift control system just like the pushbutton cars of '64 and earlier, but the manual valve in the valve body was changed and the other end of the cables were connected to a column or floor shifter with an overtravel mechanism for "park" (and a matching overtravel mechanism with spring in the valve body), instead of to pushbuttons.
By 1966 all of the linkage was mechanical and the cables were gone. The popularity of the early B-body cars with late model big block engines can create some confusion. The owner wants to keep the push-button transmission and mate it to the new engine. This is not a problem if you have the original torque converter. The 1962-65 big block Torqueflite used a small spline shaft and the later 727's used a large spline shaft. The transmission parts can be retrofitted, and the small spline converters are still available from aftermarket sources. The early (62-65) transmissions also used a flanged-type output shaft, while the later used the slip-joint. Again, the early transmission may be converted, for ease of maintenance and removal.