check this out... rear storage for tubbed cars that do not have back seat
i recently parted a 1992 dakota and it had a cool storage box under the rear jump seats.
ps...it fits perfectly in the rear seat area of my 69 dart. the car is tubbed and caged so i will not be running a back seat.
all i have to do is cut off the oem rear seat hooks, make some mounts and it should fit flush with the floor.
eventually i will recover it to match the interior, but it will provide some functional storage.
just passing this along in case it can help anyone.