Meh, my 73 Duster has a fold-down backseat and door to trunk as a factory option.
I’m 5’18” and have slept in it with plenty of room.
Heh. I used to have a ‘73 duster with three on the floor and a slant six. That was an awesome car. My only complaint was that the gas mileage sucked. The seat arrangement was the same as my Scion FR-S. The seat folded down but it wasn’t quite a hatchback since only a trunk lid opened.