I would check out Joshua Farrington's book, Black Republicans. You can hear an interview with him on the New Books Network. Although not exactly what you're asking it traces the same historical trends and events. The story it covers is that after 1880 the GOP was less invested in Black Americans and as Black Americans immigrated to the north, especially after the boll weevil infestation, the urban Democratic party machine saw that they could be part of a useful urban coalition. There's starts and stops to this (think Wilson and then FDR), but once Truman had integrated the military, the Dems were locked into the civil rights path. This created an opportunity for the GOP to start poaching white working class dems in the south. Barry Goldwater tested this unsuccessfully, but Nixon perfected it's dog whistles and subtext in what came to be known as the Southern Strategy. On top of that you have things like the Chicago Campaign by MLK that failed and William F. Buckley's campaign for Mayor NYC which showed the GOP how to use the strategy in the industrial north too.

There's a good book by Nick Buccola called The Fire Is Upon Us about James Baldwin and William F. Buckley that gets into Buckley's tactics in NYC. https://www.nytimes.com/2019/10/18/books/review/the-fire-is-upon-us-nicholas-buccola.html

https://newbooksnetwork.com/joshua-d-farrington-black-republicans-and-the-transformation-of-the-gop-u-pennsylvania-press-2016

Edit: I'll also throw in Mothers of Conservatism by Michelle Nickerson. It gets into how fears of integration in places like Orange County lead to kind of a intellectual and activist powerhouse among upper middle class white women that helped push people like Nixon and Reagan who made use of the Southern Strategy and fears of "communism" to fight civil rights and how they became the base of the GOP.

https://newbooksnetwork.com/michelle-nickerson-mothers-of-conservatism-women-and-the-postwar-right-princeton-up-2012