The designs are nice, but the idea of luxury SUV’s wasn’t prevalent at all until the late 90’s or so, the LT and Fleet models are far ahead of market trends
Not really. In 1985 the Chevrolet Suburban was built on the frame of a pick up truck but given a station wagon body. I believe but am not sure, many states and insurance companies classified the vehicle as a station wagon but some called it a truck. Also, the term sport utility vehicle is a product of the mid nineties but not the vehicle itself. I think it was the Jeep Cherokee of 1984 that actually kicked off the SUV craze. The 1984 Cherokee has the body style that follow on designs are more or less based upon today.
So in 1985, the Diamond Fleet and Diamond LT would most likely have been classified as trucks but the idea of calling the Fleet a station wagon is not far fetched.