6.4 Head ???

I was under the impression the 6.2 was just a de-stroked 6.4 with a supercharger, so probably not much head change. Doesn't mean they won't have something new, just thinking they'll probably be reusing most parts as opposed to making a whole new engine again. I didn't think the 6.4 was necessarily different heads from the 6.1, but I haven't really looked into it either.