I think I was trying to use the 11 Confederate states as my definition of South, but looking back at that list, I realized I actually used the 16 slave states.
As for a majority.....
Electoral votes of slave states in 1860: 199
Electoral votes of free states + states that were not states in 1860: 329
So. the South makes up 37% of the nation as a whole. Republicans tend to win around 60-40 or a bit less in presidential elections across the South, so that would give Southern conservatives around 22% of the national electorate. Assuming the electorate is split 50/50, that gives the South 44% of all conservative voters.
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Congratulations to SuperNiceDog, Guru Winner, who was smart enough to pick
your 7 time champion, Link.