by the way that is not me in the photo. That is my mechanic Betor proudly standing by the engine he assembled for me. He is an amazingly experience Saab guy and has worked on so many he has lost count.
I put 200 miles on the Saab yesterday have almost 700 miles on the new engine and will do an oil change in the next day or so.
It is really working well. The difference with the new lighter flywheel is just amazing. It really accelerates will in the lower RPM ranges. the engine feel much more flexible with the lessened rotating mass. Also the engine is very smooth in that it is very well balanced. the crank, flywheel, and pressure plate were all balanced separately.
This the cover plate with a small piece of rod welded in place to balance it. This is a Sachs OEM Aero unit. I am surprised that the factory balance was not better. Maybe they balance the disc be for assembly and not after??
This is the 11lb Spec brand flywheel with the balance drillings to bring it to perfect balance.