Wow. He needs to resign immediately.
What if he says it was from 1984? Do you expect people to know the meaning of blackface and KKK costumes in a Old South of 1984 that still elected people like Helms, Thurmond and Lott?
Thurmond had already abandoned his segregationist positions by 1984. He voted to reauthorize the VRA in 1982 and voted to make MLK Day a federal holiday in 1983.
Basically the only prominent segregationists left in the Senate from the South by that point were Jesse Helms, John Porter East, and Jeremiah Denton. There were two segregationists from Idaho (McClure and Symms) in the Senate, too. Pretty much all the remaining segregationists in Congress abandoned those stances by 1980.