Jeff,
I have that Wilwood kit (140-7144) on my 71 Cuda. I made the e-brake system work using the original cable, a Lokar "Ford Explorer" clevis kit (EC-81FC), and some aluminum 1/8" cable ferrules from Home Depot. I had to cut off the original cable ends in order to fit the cable through the clevis ends, then just press/hammer the aluminum ferrules onto the cable ends. Oh, I also removed the cable sleeve-springs because they were no longer necessary.
The end result is, the system works. The park brake pedal is pretty stiff with all of the springs in the system, but the cable has functioned without a problem for over a year now.
Good luck.