Camel back heads?

Camel back heads What years where these heads made? What should I look for when I do find them? I have a friend that says he thinks he has a pair of them. Now I was wondering if anyone could give me some info as to casting numbers. What to look for and valve size. If anyone can link me to some pics or help me thanks in advance.

Camel back heads are a misleading topic, some say they are a certain size valve and cc but over the yeras i have had them in several different sizes. My advice if your looking for heads is go after market, much better choices there.