I must have the wrong end of the stick.... The HS uni flange unbolts from the diff output flange and the diff just slides straight apart???? Splines don't come into it....
And yes, the engine needs to be tilted right back. Lifting lugs fitted into the spark plug holes provide the perfect angle... It is annoying that the distance between the subframe and top front cross member is EXACTLY the same as the distance from the top back of the remote mount to the bottom corner of the gearbox.
Would it really hurt to give us a spare 3 or 4 mm....

Years ago I had a Close Encounter of the Marsupial Kind. When we put the front end back together we made the crossmember removable. Makes things much easier.
Cheers, Ian