have engine side toward engine Andy.
Im fixing to pull the stock trans mount bracket to see if there is any offset to it at all.
Motor plate is also square to core support - same distance on both sides.
Seems it has to be some sort of trans mount issue.
I just dropped plumb bobs on both sides in rear and rear housing is centered and square to car.
Im just pivoting on trans mount - near as i can figure- I have a problem there.

As you stated-" If i was a chassis builder i would go broke", on top of that, lose my mind- grin!

Did you have room left for your trans cover or blanket- cant remember?
Im "really tight " towards top of trans tunnel at bell housing.