Here's a good example of such a truck: this 1982 model in a Denver wrecking yard. Subaru BRAT was a big sales hit in Colorado, much more than in the rest of North America, and you still see plenty ...
On paper, and due to the rear-facing bed-mounted jumpseats, the BRAT was technically a car, which got Subaru out of an excessive light truck tariff versus that of passenger cars imported from Japan.