While the Aspen/Volare might have been a better riding vehicle, I had a 75 Duster and when I opened the trunk lid and saw the non-flat floor with about half the room, I did not trade mine in and walked away. The Duster had near station wagon storage capacity and with three kids, I needed all of that to take a week long trip. Having a Super six would have been nice but I later towed a Winnebago trailer behind for probably 8k miles with the 225 and manual OD trans and got 20mpg in that configuration. (Had to have air shocks maxed out due to a heavy tongue weight and long tail on the Duster). Still one of my favorite past vehicles. Without the trailer, it got 30MPG.