And, I have seen the Volvo swap.
From the amount of fabrication work needed, I don't think it is really worth it. Since I can't weld at all myself, I'd need to pay a lot of cash to get all that done.
Another EDIT:
I just opened up the files again, and it looks WAY too similar to be that different. The only thing that looks different is the bore size, looks bigger on the 2.3
So, not gonna give up til I get a template of the head mating surface.