I have a friend that has a four engine pull tractor. When I'm around just before they leave for a pull I sometimes get roped into taking the gasket rings off the spark plugs. Each engine uses 16 plugs and he takes several sets for each engine so it is a lot of brand new gaskets that just get thrown in the trash. The reason for the discard is the engines are hemis and use the bottom of the spark plug tube for the seal. If there is anyone in your area that uses hemis for drag/boat/pulling etc. they would be more than glad to give you the unneeded rings. If not let me know.

Evan