I'm had a Bimmerworld kit w/ a JB flywheel and Clutchmaster Stage 1 organic clutch in my e36 M3 for 3 seasons of track and street use. Sometimes it's a little bit of a pain when you're say, parallel parking in a small space on a steep hill, or if you slip it bit, in which case you get a whiff of clutch immediately. But it hooks up very well and the car pulls harder in low gears. It's great for autocrossing. My Radical has essentially no flywheel - it's the rotating mass of a GSXR1000 engine w/ it's stock clutch and gearbox. The clutch engagement zone is about 1/4" long. I do still stall it now and then, but one grows accustomed.
I say do it.
