Guys, I'm working on a '97 Prix GTP, and am having some issues figuring out head gasket placement. I bought the FelPro head gasket set that comes with head gaskets part# 9089PT, but they don't specify Left or Right. How should they be placed? There is a difference on both sides with one side having no letters and being flat, and the other side having letter and saying R1. Has anybody encountered this problem? Thanks in advance.