I have a couple of dummies I removed the trucks from and powered with a totally different system. The trucks on the dummies appear to be identical to the ppowered ones and ones I have, have both the axle gears and the idler gears but not the worm gear and shaft. And of course the motors and pickups as listed above.
So the short answer is, yes it is possible. However it will require either getting a bunch of parts to complete the power trucks or getting replacement power trucks or a chassis.