So I resort to the Fidanza Aluminum Flywheels

Ultra Light and weighs only 8 lbs
SFI approved 2 part design with replaceable clutch contact plate delivers the highest quality and longest service life of any flywheel available.
Fidanza Aluminum Flywheels are made using the highest quality, most modern materials available. The flywheel itself is made from 6061 T6 billet aluminum. It is CNC machined at a constant surface speed for durability and finish. The friction surface is very special. Fidanza uses a 1050 high carbon, alloy steel. It is incredibly durable, allowing the user to use just about any clutch disc material available. The friction plate can be machined or replaced as needed. The plates are secured with 16-20 hardened aircraft quality screws with self locking nuts which prevent any warping. Fidanza uses hardened ring gears that are swarted to the flywheel with button head screws that are counter board between the flywheel and ring gear to prevent any possible slippage. The mass at the center of the flywheel is retained for strength, but the mass at the outside is eliminated for optimum performance.
and The F1 Racing Xtreme FRX300 clutch kit

Horsepower Rating: 463 HP / Torque Capacity: 412 ft/lbs
The F1 Racing Xtreme FRX300 clutch kit utilizes an extreme clamp load pressure plate paired with a 6-puck spung-hub clutch disc. This is an excellent solution for high horsepower vehicles looking for a quick clutch engagement. The spring hub serves as a torsional damper that absorbs the shock of a harsh engagement in order to protect the transmission. The ceramic material is lightweight and has, on average, a coefficient of friction 28% higher than that of organic discs. The Xtreme pressure plate has a higher clamp load than our Performance series, resulting in even higher torque capacity.
The info is for anyone interested in the product....