Back when the emissions regs were less stringent, I think they could mix and match drivetrains without as much need to do certification and durability tests to satisfy the fedgov.
The Eagle and the Jeep Cherokee of that era were really forerunners of today’s massive compact SUV wave.
I'd point out Power Wagons, Suburbans, IH Travelalls, Willy's Station Wagons and more that don't come immediately to mind.