The power train will be interesting as well as the procurement (or manufacturing) of the trucks which are very rare, expensive ($90 for the sides only) or almost impossible to find for this kind of vehicle.
Entire drives including the sideframes should be readily available from Q-Car generally for ~$150, or thereabouts. Should have asked Quentin about this when I talked to him last Sat. at the East Penn meet.
The drive for the American Standard kit generally used a Q-car set of trucks with a pair of magic carpet drives; got a set that I am saving for a kit bash of the same kit since someone else already did the bashing 1/2 of the project.
Not sure, but you might be able to get a regular Q-car drive under this with a little compromise of interior that can be disguised.