Highest flowing sbm heads?

I too am old school. Very old school, just look at my builds.. LOL. However, I'm a realist. I have no issue accepting reality. If I choose that route or not, I'm not afraid to acknowledge it. And although I'm not "hemi swapp'n" anything of mine today, for the sake of the OP I brought up the New Hemi's and their heads. We cannot ignore how fast those heavy pigs can be box-stock off the showroom floor. And with mods, they can be crazy fast, especially when swapped in a under 3000 lbs car.
I would put a full tilt W8/W9 build up against a full monty Gen3 anyday at the same weight.....I know what would happen