Use felpro gasket. Replaced mine on the '98 ZJ without issue. Would suggest you degrease the engine around the gasket prior to removing the Valve Cover. This will assist with keeping dirt, grime, etc from getting into the engine while the Cover is off. read that on another thread prior to replacing mine and it helped a lot. When you re-install the Valve Cover, tighten the bolts from the inside, moving out, so the cover seals properly.
Good luck to you...
2004 Jeep Grand Cherokee Limited 2x4 4.0L
2002 Jeep Grand Cherokee Sport 2x4 4.0L
1998 Jeep Grand Cherokee Laredo 2x4 4.0L
"Three daughters, three Jeeps"