[DennisAN]

Originally Posted by Bigsmoothlee

I plan to run a lightweight aluminum flywheel ( after taking to a machinist to balance ) and a SPRUNG clutch disc.

IIUC Porsche combined the effect of the front pulley harmonic balancer AND the springs in a traditional clutch disc in their dual mass flywheel. I suppose you could put on a single mass flywheel if you use a "sprung" clutch disc and a harmonic balancer belt pulley up front.