All but Missouri and Indiana. I will admit that "culturally Southern" is going away. I consider Virginia and Florida culturally Southern, at least for historical reasons. Texas and Louisiana have similar statuses, but are culturally Southern.
There's a huge difference between LA and TX unless you ignore the vast majority of TX west of the Trinity river.
I meant that they have similar statuses in being kind of Southern, but not exactly Southern, not that they are the same.
Appalachian culture =/= Southern culture
I think they are both aspects one overarching Southern culture.