Hi David,
Thanks for your reply.
The pics of the vehicle only show 1 rim w/tyre on each rear hub and none on the front so I'd say from your suggestion that if we had more to choose from then we'd be able to do it as you describe. Unfortunately it's too far away to hope for the best. I've suggested that Dad make a gasket style pattern to suit the M35 studs/rims and mail that to the former owner and see if he can wave it over the truck. Perhaps we might be able to have a reversed rim on each rear hub if the drums won't clear but my guess is drums just got bigger rather than smaller..? So hoping the stud pattern/holes are a match.
Alex