luggage rack on top of a sedan or 2 door car.

My folks bought their 70 Dart new (I still have it) and they had a topper from Sears - 4 big suction cups on 2 side to side rails, straps to clips on the drip rail, a solid floor (looked like the material they make trunk spare tire boards from), and a soft top with zipper doors on both sides (had some metal stays that kept it all in shape. We traveled all over the place with that thing and it was a snap to take it off when we got home. You can choose a retro style and still look like 1970!