I am looking at buying a set of BBC heads with a GM performance part number of #14044861. I was told these NEW unused heads have raised runners, W ports, and that the seals & seats are installed. I went to the GM performance parts website and when entering in this number all I could find out about these heads were that they are DISCONTINUED! Perhaps Pat, Eric, or one of the other BBC experts will be able to tell me exactly what these heads are? I know they are cast iron, but do not know if they are open or closed chambered, the cc size, or anything else. Without enlightenment I do not want to purchase because I don't need any WHITE elephants hanging around.