Rear disc swap

67 dart, 8.75 rear end. Using 'The right stuff" swap kit. Using Dr, diff axles, good deal on the axles. question, the emergency brake cables provided do not work. Both cables provided are the same. Right side needs to be longer, but neither work. Old ones will not work either. anyone deal with this and what did you do? I know pictures but none available. Sorry. I am going to call there cust. support and see they they say. But I trust you guys more.