Hi Mr K,
I think you'll find it's an MT75, straight out of a Transit.
Bit agricultural and 1st, combined with the rear axle, a bit short. Does me though.
Sorry, cannot answer the other questions from personnel experience though have gazed at the power train more than once and wondered about removal. There's a good deal of room so I've always thought engine & gear box through front end. Don't particularly want to do it though. Why do you?