i'm in process of this swap right now. once completed, i can tell you exactly what i needed and what i did (compared to the write up).
here's what i've done so far:
1) get used E30 3.73 LSD
2) ordered used E30 half shafts
3) ordered a crapload of new mounting hardware, M coupe finned diff cover, speed sensor, etc
4) clean it up and paint it (see my thread that i started for covering that)
*** insert tremendous help and experience of my best friend from here down ***
5) remove half shaft flanges and seals, install new ones
6) remove old diff cover, clean up mounting surface on diff (all old gasket material, etc), spray new gasket (both sides) and all mounting bolts with high-tac, install new M coupe finned diff cover
7) remove halfshaft hub nut lock ring and nut (they were rusted in there like you wouldn't believe, my friend worked those out and then used an impact wrench to break the nuts free while i worked on the diff)
that's as far as i've gotten so far, have to drop the exhaust and then finish up the diff job today ... then install the new superspring exhaust too