I'm using a TCS 9x11 billet piece. I special ordered this from Rusty stating that it was going into a 1000hp buick. I think he built it "himself". He even custom built it with a deeper snout and mounting tabs to account for my 3/8" advanced adapters plate.
It's a lockup, but I only use the lockup for driving not racing, although it had a kevlar clutch and Rusty said I shouldn't be scared to.
I have to write about this: the last time I went to the track, I moved my shift points down to 6800 vs the 7200 I was using. Shifting at 6800 I went 10.45@132. (A few weeks earlier, with 22psi shifting at 7200 I went 10.26@135.) In all of the passes of the day, I totally forgot to turn the shift points back up! I think this is the ONLY thing really, that prevented me from going faster than the 10.001 I did on the passes I could get in (ran out of time).
Being able to change those shift points instantly was great! but it can screw you to when you're too excited.