Lost Clutch on the line... at the track

My car never made a full pass down the track without breaking something in the driveline when it had the 4 speed in it. It was just too brutal. To keep you from the same fate I'd suggest you contact a couple clutch manufacturers to see if you can get a dual disc setup that would be softer on the hit to help save the driveline. I also hope you have a blow proof bell housing on that car. I'd hate to hear about you losing your feet.