Here’s the way I see it. The workshop manual got it wrong (it can happen) and the other authors just did not do their research and just repeated what was written there. Every actual MkII I’ve ever seen has the HEH-CF transmission on it, so it make little sense to me that the HEH-B was the one on the MkII. The only possibility is that some had the HEH-B or, vice versa, some had the HEH-CF. But with Norman saying the HEH-CF is correct and every MkII I’ve seen having the HEH-CF on it, I have to believe the HEH-B is not the right gear box. Regarding the bell housing, I think there may be some confusion. The wide ratio transmission had both the narrow and wide bolt patterns, and the six bolt bell housing could accept both. I do not think, though I never checked it on my car, that these would bolt to either five or six bolt patterns on the engine side.
I’ll look for Norman’s statement and post when/if I can find it. Cheers.