1957 civil rights act, the Republicans as a higher percentage than Democrats, voted for the civil rights act, without Republicans the civil rights act would not of passed.
1960 civil rights act, without the vast majority of Republicans voting for the Civil Rights act, the act would not of passed. Too many Democrats opposed. The only way it passed was with Republican support. As a percentage, more Republicans voted in favor than Democrats, in both the House and the Senate.
The Republican President signed the bill, Eisenhower
1964 civil rights act, again the only way it passed was with the vast majority of Republicans voting in favor. Again as a percentage more Republicans voted in favor than Democrats.
1968 civil rights act, things were a bit more even with the Democrats voting in favor with a higher percentage of Democrats than the Republicans.
Yes, without the Republicans votes, the Democrats would of not had enough votes to overcome the Democrats voting against. And that is for all four civil rights acts I listed.