Good points.
However, I think we could make a case that modern Ford wheels are closer to classic Mopar wheels than modern Mopar wheels are. At least the Ford wheels have the 5x4.5 bolt pattern. :)
Speaking of hubcentric wheels, I know some guys get away with running modern 5x114.5 Charger/Challenger wheels because they're "close enough." This is where tolerances might start to stack up in a bad way.