Why did Goldwater do so well in Florida in the 1964 presidential election?

[TML]

In North FL, Goldwater’s success can mostly be explained by civil rights (due to the Democrats’ embrace of civil rights, they lost most southern whites and most southern blacks weren’t able to vote at the time). Elsewhere in the state, places where Goldwater won but have been D-leaning in recent elections were whiter, more conservative, and less diverse back in the 1960s compared to now.

[TML]

I'm more curious why Orange County (Orlando) was so heavily Republican in the 50s and 60s.

1952: Eisenhower 71, Stevenson 29
1956: Eisenhower 72, Stevenson 28
1960: Nixon 72, Kennedy 28
1964: Goldwater 56, Johnson 44
1968: Nixon 51, Wallace 27, Humphrey 22

Back then, this county was whiter and less diverse compared to now.