Emergency Brake Cable Question

I am in the process of changing out a 7 1/4 rear end with 9" brakes out of a 64 Barracuda to a 8 3/4 rear end with either 10" or 11" brakes, will my emergency brake cables work for the change out? The original cables are approx. 25" long. If not, can anyone give me advice on a remedy? I am also dealing with the large bolt pattern. :banghead: