Here is a photo of the balancer again-
See all those small not very deep drilled holes under the pulley in the balancer, that balancer looks a lot like one I have off of a forged steel crankshaft 400 truck stick shift motor
I haven't seen a late model truck or motorhome 440 motor with a stick shifts so I have no idea if they shared a similar balancer like the 400 motors had for the stick shift cranks, DANG Mopar anyways for having so many different parts on similar motors