That is a bit big!!
What is your goal or reason for upgrading your current turbo?

I am also very interested in this E30 diff special. My brother has a SSS L20 turbo. We have already sourced 280z shafts. Now to see if these shafts will fit with the E30 diff.
They recommend Suburu LSD but they are very expensive here in South Africa and scarce as chicken teeth. Would like to know how this turns out racetech......