Head Gasket Installation

Using Felpro permatork head gasket, on a 1998 buick century, 3.1. There is no "up" side indicator or arrow for front or rear orientation, on gasket. One side does have a little "bare metal" in the center only, near the middle two cylinders. How to tell up or down? Both gasketts are the same, and all water holes line up either way. Anyone know how to tell which side faces up from the block? GOT IT! It dosent matter which side you use on this particular gasket. I just installed it with the "Complete metal rings" facin the heads. Thanks everyone.