The Driveline Performance HD clutch from fuelteknology (on Ebay) has the option for the HD clutch which is full steels, one extra fiber (for a full fiber set instead of the one wave fiber) and 10% over stock springs. They also sell the 240HD clutch which is the ful steels, full fibers and 20% over stock.
I bought the 240HD clutch for my eventual plans but went ahead and installed it into my bottom end I've got now and let me tell you... the clutch pull is like night and day. The clutch engagement is also MUCH more sudden than a regular clutch kit too. If you don't NEED the "240HD" kit, I would probably go with their "HD" kit and have the easier clutch pull but, so far so good with the driveline performance clutch kit.