Take it for what it's worth, but I use regular ole Permatex Ultra Black silicone for the headers. The Ultra Copper doesn't seem to stick to anything very well and that is why I stopped using it. I haven't bought header gaskets in 14 years, so I stay with what works.
Old cheapy steel gaskets that came with the rebuild kit but I have a trick my buddy showed me. He owns a muffler shop and is a all Ford hot rodder and racer; he uses Tremcald roofing tar(insta-patch). I did the same trick and have re-used these gaskets 3 times and no leaks.
I've heard that the loc-tite cooper with no gasket also works well.