So what exactly did that Nissan come out of?
The SD22 engine came from a 1982 Nissan 720 two wheel drive pickup. They were only used from 1981 to 1983 in the US. The rest of the world is still using them as SD25. This is the same engine family as the SD33 which is used in the IH Scout around 1980.
I can't wait to try bio deisel! (used fry oil). Can you smell the french fries yet?