66' Barracuda and 273 with headers

In an earlier post, you mentioned custom head gaskets. Can you share who they are being made by? My 273 is being machined right now, and I am using 302 heads on mine. My builder and I were discussing the problems with using head gaskets designed for open chamber heads, and having a one size fits all fire ring. If they haven't made yours yet, maybe they will make 4 of them cheaper than 2 at a time....lol.