which heads for a 408ci?

they just cleaned up the bowls. no back cutting. they even still have the cast valves in them. the rockers are just old ductile iron 1.5 's with steel pedestals. the only reason i say go with the w-2's or w-5's is that you can achieve the 500 hp and a couple years down the road you can achieve more if you would like. racers and engine builders never seem to be happy with what they have, they usually want more and more.