Indy Cast iron heads

My buddies 440 has these heads on it. I have never had any dealings with The Indy cast heads to be honest I dint know they made them. He says the have 2.14 and 1.81 valves but other than that knows less than I do. Does anyone have any history with these. Iam going to look when I get time he say the Indy name is cast inside them I have no clue if it is or not.