Duster....

Are you talking about one of those little crap boxes from the late 80's- early 90's or actually dropping a 4banger in a Duster (a real one and not one of those little crap boxes) ? Why don't you just find a running and driving slant six duster for 500 bucks, give it a tune up and drive the piss out of it? It will be easier and cheaper to fix than a crap box.