gasket failure

1968 FASTBACK , 2" TTI headers , wrapped w/ lava rock header wrap , hi dollar rubber valve cover gasket w/ steel core , mopar performance valve covers . The #2 tube is so close , it`s burning the gasket up after a few miles of street driving. Any body ever experience this ?What did u do about it ? Andy, Iq52, or MRL ????? Anybody make any asbestos type gaskets that won`t leak ? sugestions appreciated .----bob