I believe it is because trooper II's were brought into the U.S. with no back seat bolted down. The back seat was bolted down at the port when it arrived. This was to avoid the chicken tax
My Trooper is a II and it is an 87. The door tag says "Truck" my title says SUV. As a side note, I only put my back seat in periodically when I know I will have a second/third passenger which is very rare.Yeah, it was literally just a tax loophole as the Trooper II's were technically "trucks" and were subjected to less taxes. Rear seats were just dealer-installed instead of factory-installed. Pretty clever. They're essentially identical!
For you guys with Trooper II's ... are your plates truck plates? Does your title say truck instead of suv?
Also, do we know for what years there were "II" counterparts in the US?