how do you disable the clutch start switch? is it just a wire that you cut? where is it located?
back on topic, i have a spec stage 2 clutch on mine and its been great. pressure plate is rated to hold over 400 torque and its very streetable, as it uses a kevlar full face disc. pretty inexpensive too, $350-400.
i have run in to one occurance with it though in the year i've had it. it was the night i ran that 12.9, we were slipping the clutch as much as possible off the line and busting out 1.8 60ft's with maybe 350hp and 4000lbs, doing multiple runs, and it did fine at the track, but on the way home, if i went full throttle, as soon as it made peak torque ~4000rpm, it would start slipping BAD. i also had a passenger on the way home and figured the flywheel and clutch were just really hot, so i took it easy the rest of the way and once it cooled, i haven't had any problems since.
hope that helps your clutch buying decision!