Help to identify GM heads
My brother has a BBC468 but we would like to know what type of heads is on it. I am not sure if you can look at a BBC head and tell like you can with a SBC you know double hump heads. We would like to know if they are oval or rectangle. I have seen where they say rectangle is the better of the two for performance. If any one could tell us would be great. The picture of the engine is in show off under woodsman's brother truck. Thanks for any help you can give.