Mopar has dun some fun stuff, look at this thread http://www.forabodiesonly.com/mopar/showthread.php?t=153322and give us more details on what duster you have, V8 size, /6, automatic or standard, wheels or caps.
Buckets or bench space saver ( the back seat folds down to the trunk ) This will help us help you
it almost looks like the same Hang ten that AdamR had, the stripes look to be the same color and he had a half vinyl top also, a tec will jump in here on your #'s soon
Did you look at the thread I posted in my first post ?