Start by removing these, and the front axles too:
So you're left with this:
But wait... what's wrong with this picture?
Tune in next week, when we install the shaft that the clutch fork is supposed to be sitting on, and continue where we left off... The R180 rear diff, Spec B axles, and Exedy Twin clutch are all installed, but there's nothing more we can do until that rod gets here.