I torqued down my heads to a new head gasket (Fel Pro from the Ford Motorsport 5.0/302 Gasket set), only to realize I had to pull the heads back off for some slight mods. When I pulled off the gasket stuck slightly to the head and when I separated it left some of the thin film on the head in a couple of places. I just cleaned that off the head, and inspected the gasket and it looks ok. Am I safe to reuse this gasket? The motor has never been fired. Thanks!