Ok,

At first I could not find a description of what they were for, even where they were being sold. I did finally find that description on Summit. Apparently they are intended to correct the thickness lost after surfacing a flywheel. They go between the crank and the flywheel.

http://www.summitracing.com/parts/atp-gs3?seid=srese1&gclid=CLj5kfCuwskCFdEXHwod88cEMw

Quote from site:
"Get proper spacing and engagement with ATP flywheel shims. These steels shims offer you the adjustment that you need after having your flywheel resurfaced. Improper clutch location can be dangerous and uncomfortable. Make it right with ATP flywheels shims."


Larry W.

1953 3800 Dually Flatbed