Help identify these heads

They are better than any original production head, XJ etc. they have been out of production for many years. The tooling was lost when Indy changed hands and they will not be produced again. They have just recently been approved for FAST, but no one wanted them. They are clearly a performance advantage over the other heads. At least no one I know. If you want cast iron that will run stock intake/ exhaust parts. They can be pretty good. Closed chamber, better exhaust port…… I’m leaving now.:):):)