[Rwillia4]

sorry I did not read all of the responses...I wanted to skip the b!tching.

I have a 427W, T-56, M3 LSD and race springs. I think this is a pretty similar setup to what you are looking for. I can not comment on an open-diff. But with my LSD, I have had no problems with tracking around corners and never had the rear unpredictably kickout, never. When I want it to kickout it is easy to do and also VERY EASY to recover. It is so predictable I am thinking of going with bigger sway bars to stiffen it up a little more but I'm working on other upgrades (solid mounts for the engine, diff, x-member).
I (well at least use to) live in CA. The T-56 is great, highway speeds are normally 75mph, so the 6 gear with a 3.46 rear has worked well. ...yes I will be back in CA soon, gotta love the military life.

I didn't read how you were going to use it. I do both daily driver and SCCA.