Welcome aboard, should be a fun project, not sure why someone would have put a small bolt patern in the rear? I don't believe they even had them from the factory anymore in 74. But not a big job to change or a hard axle assembly to locate. Just out of curiosity what the hell was that little odd shaped yellow car behind the Duster in the photo?
That is a great question, it had a motorcycle engine in it and was aparently produced for a couple years before the company went under. I can't remember what he said the name was though...