I cant thank you guys enough for the insights here.

So it sounds like an 8.75" despite being a semi-floater is still plenty reliable for autocross and road course work so I guess the more important question would be whether to go for the Eaton Trutrac limited slip or save the money and stick with the regular clutch type...

I'm currently running a stock Magnum 300 crate motor with a mildly built A904...so pretty mild stuff at this point...but I do plan to run modern tires soon and I also catch myself daydreaming about swapping in a 6.4L modern Hemi and a T6060 at some point so I do want to leave some extra capacity for more power down the road.

IIRC, the Trutrac is a Torsen style unit, right? I gather that these last longer than clutch types but is there any other advantage?