I can't see any reason why the cranks won't swap over even though I've never bothered changing cranks on a powertorque as a good mower is $10 at the tip and almost every time I throw scrap metal out I see a good Victa powertorque mower just left for scrap.
A little late now that the motors are apart for disassembly techniques but you can use wood or brass as a drift to hit the crank in or out.
Good to hear Norm no longer has the possum issue anymore.