How would i go about putting a ba auto box into a ef auto?

I understand the rear extension housings can be swapped, so tailshaft and speedo gear can be used, the front bell housing has to be swapped, and you need an AU gearbox loom, due to a wiring change.

Thats about the limit of the theory I have investigated, but have not tested or measured to confirm moutning points/length and swap ability of the above.