I've been hearing about these heads for a bit and apparently they're ready for prime time. Developed by Edelbrock in collaboration with Curtis Boggs (google him, he's a serious bad ass in cylinder head porting/development world) and are now available to the public. 2 designs on a 4.84" bore center and 2 on a 5" bore center Dart/Brodix style block. Very cool stuff if you got the grip. For the lucky bastards that get to go, these heads will be on display at PRI.
Evolution of the BBC head (not my pics, "borrowed" from Edelbrock)