An option could be the aluminium 240mm fidanza flywheel with the standard 240mm pressure plate and clutch disc. It would be about 11lbs lighter than the standard clutch. That is around 30% weight reduction on the standard 225mm flywheel and clutch at 37lbs. It can handle 50% increased torque and still have the standard clutch peddle feel.

Just a few months ago i went on a quest to find one of these. I think they might be extinct. Also the cost of lightening and balancing the flywheel was more than buying an aluminum aftermarket piece. I didn't find a single "speed shop" in my area that would lighten a flywheel citing safety concerns, but there were a few regular machine shops.

I bought mine in May of this year for $45 plus shipping. At the time I believe there were 3 or 4 around the US.

Do search here, Car-Part.com--Used Auto Parts Market , quite a few still come up.

That is a great site, thanks for sharing. I thought I knew where all of the good stuff on the internet was.

I just went and pulled a 225mm flywheel from a 77 280Z in the Portland area. Couldn't pass it up, they're having a 1/2 price sale. I only went to take a look since I figured it would be more work than I wanted to do, but somebody else had already pulled the transmission (for the bellhousing apparently, the tail was still there), and the engine was tilted back with everything waiting for me. The pressure plate looked so good I got it too, it looked Nissan issue, both for $26 total. Neither needs resurfacing. Simple pleasures, collecting stuff (junk?) I don't need, easing my fear of not having a part..