One head that was not mentioned is Blue Thunder which for high performance application is far superior to Edlebrock and Shelby. But when I last checked required Tand D style rockers. They are around the cost of Shelby Aluminum. Precision
Oil Pumps sell them bare or complete with machine work done.
http://www.precisionoilpumps.com/
Talk with Doug and he can fill you in if you are interested in finding out more about BT heads.