Nothing wrong with old steel shim gaskets. Cork wil ldry and shrink, rubber might do the same depending. But the shim head gaskets are timeless unless they get bent or rust.
But to Tim, I like the steel shim head gaskets. I always coat them with Copper Coat and of course, they have to be retorqued. They can stand lots of compression and can add compression when compered to other types of head gaskets.