Thanks man. Your car is awesome too, and a good source of inspiration for me.
Yes, it's a used Tremec TKO600. It doesn't have any mods like the Keisler TKO has, so I had to hack up the floor quite a bit to get it to fit.
As for the rest of the drivetrain, I have an almost-new (8000 mi) 360 Magnum block to make into a 408 stroker. I plan to use ported RHS iron heads, hopefully 475hp or so... I'm using a Quick Time bellhousing, Centerforce clutch, and a narrowed 8 3/4 with 3.73's and a Sure Grip. Rear tires are 315-35-17.
