You will need the forum to keep it running. That car was not unreliable, it was an very good runner, but like all of these old diesels it is aged. With that few of miles my guess would be that you will run into several systems that are failed or will act up shorlty.
Question is it a Waste Vegtable Oil Candidate? Absolutely, the old technology diesels are much more forgiving with lousy fuel, they will run on most anything, even french fried cooking oil.