Agee that the tru-trac seems to be the ideal. My understanding was that the version we're talking about may not be available for the 8.75, and there are also some assembly issues that come along with it.

I too found the tighter a limited slip is set makes it harder to drive (oversteer). The nice thing about the clutch (Dana) type sure-grip is you can replace the clutches and change how tight it is set. Mine was set tighter than I like but its not high on the todo list. Only chirps on tight corners on the street, not autocrossing. But, autocrossing and snow is where it's harder to keep the back from sliding than before It replaced a cone-type sure grip that I bought used and got roughly 70,000 miles out of it (and a lot of autocrosses).