904 dual pumper

If for some strange reason you decide to swap from a 1- to a 2-pump Torqueflite or vice versa, it means you have to spend the money, time, and effort to also get the shifter (twin-cable for 2-pump, single-rod for 1-pump) and driveshaft (flange-type output on 2-pump, spline-type output on 1-pump) and speedometer drive (totally different) that goes with the transmission you're swapping to. Makes very little sense to do this swap in either direction. '60-'65 cars have 2-pump/cable-shift Torqueflites. '66-up cars have 1-pump rod-shift Torqueflites. Both designs work fine. Neither is materially advantageous over the other except that the '66-up rod-type shifting means fewer leak points and easier adjustment. Push starting, yeah, on the 2-pump transmissions, but that's of no great importance most of the time. If you have a 2-pump transmission, make sure it's equipped with the 2-port filter or you'll starve and damage the rear pump.