What's my big block 75 Duster worth?

Help me out guys because I have no idea. 1975 Duster. Has a 383 auto, schumacher mounts and tri-y headers, still has drum brakes and small rear-end. Interior is decent and has racing buckets, paint job is a 30-40 footer, depending on how good your eye sight is. It takes a great picture but it is no show stopper. This thing could be a really nice car with a little more tlc. You could have it road worthy in a weekend, it runs but the gas tank, drive-shaft, and power steering pump are in the trunk. I took this thing on trade so don't know much more about it than what I already said. Give me some opinions on the value please.
Thanks