If anybody actually knew who Leon is and how much he knows about smallblocks( and how fast he has been with them) they wouldnt be argueing with him.
The W2/W5 heads are race heads.
The eddie, bloomer heads are factory replacement heads.
Any discussion of race heads shouldnt include the Brodix MC head, its a dog. Nobody i know has ever been " fast" with them. Its an underperformer, at best.