on this site look at gaijin's project in the Members Project area.
I do have to ask why? I know others have done it but why? That is a lot of extra weight in the back of a S30 chassis for what? A setup that does not change camber when under load? That is about all, and the only advantage over the stock setup. For all the $$ and work involved spend the $$, time and effort in fixing other areas of the suspension that need work. If you are after the later style CV and Diff setup then check out the TTT rear conversion stuff - that is what I would do - fast and cheaper in the long run, than all the custom fab work required + the TTT stuff is bolt in
see http://www.technotoytuning.com/productdetail.php?p=863