It would b of work rebuildn the inners but not impossible & as stated thy do have a full chassis so the main structurel strength is there & would certainley be a time consuming job to make up new section & weld in but with the aid of a panel folder welder grinder etc it could be done. Only you can decide is the pain worth da gain but at the end of the day its a sandman van & i dont lyk to see any of thm go to there grave .