This is the original Hal Sperlich Minivan prototype that he presented to Ford and they rejected, considering there was no market for it... So he presented it to Chrysler instead and the rest, as they say, is history!
As I understand it, Lee Iacocca, fired by Henry Ford II in 1978, took fellow executive Hal Sperlich along to Chrysler. They set about reviving the Carousel concept (model built in '72, planned as a '76 model - below) as the T115 Caravan/Voyager after the second 'fuel crisis'.
I don't think the Ghia Mini Max was connected to that project.