Stage IV head identification

[Hemivision]

How do l identify direct connection stage lV 440 heads installed on the engine...

 

[tonysrt]

I have an NOS stage iv head and it has a casting # 3614476 and a direct connection symbol with a P next to it. You have to remove valve cover for casting #. It also has a star in between center exhaust ports, but don't know if you can see it with exhaust on motor.

 

[Hemivision]

Thanks..