Just left the engine shop. There's so many things wrong with it it's beyond saving and it's been "repaired" at least once already. It was a hot mess, surprised it even ran before it was opened up again. If something could be done wrong, it was.
So the XJ 400 is there now. It looks like it's never been apart so hopefully it's usable. If not, the engine builder knows someone with another b-body '67 400.