273 head gasket questions

I should have maybe started one thread for all the questions we are going to have.... so cyl head gaskets, have no "up" or "down" marked on them..does it matter?? Also the "destructions" state if it is "steel" backed it needs sealant...if it is fiber backed, none needed. Now to me it looks like this is fiber, as the only steel that is obvious is in the "fire ring".