I had 63 Ply. Valiant 2dr hdt 225 slant6 w/ pushbutton torqueflyte - cranked when dizzy dry at about 35. 67 Dodge Dart GT 2734bbl solid lifter with similar floor shifted box cranked at 28, and you had to start the push with tranny in 1st to get it to work - no shifting out of neutral after rolling. Both dual pump types, as were the GM Hydromatics, and some powerglides (powerflyte in my 55 desoto).

Our's won't do it - no way to spin the sole front pump to get clamping forces in the tranny

Not responsible for advice not taken...