It's a well known fact that Jimmy kind of fooled voters over his stance on race in the 1970 election, however, as you said, once he took office there was no questioning his opinion on the matter. Latter, I don't think he really would have dreamed of making such a political move, but his time as Governor and testing the water of national politics (1972) changed him.

I don't know where exactly, but I read a statement made by very dissapointed segregationist Georgia voter regarding 1970 race. It was something like: "I voted for Wallace, but ended up with Humphrey".