First off , most of what you write , is hard to read or understand.
You seem to contradict yourself..
Like post # 50.... if it's true.. why are you here asking.?
And things like the cylinder. .. lines up, except two studs... well that is a long, long ways from working..
I suspect that maybe, 750 pistons were planned to get used in this, and maybe the cylinder is there, in case the sleeves are to be used.. ? I think a few guys are doing that.. that seems far more likely... an then you would have your 750 pistons in the 650 motor , that you speak of. Do you have access to machining ? These things do not fall together..