You have to be a lot more specific than that. What conversion was done? It depends on what calipers are on the car mostly. The common conversion with factory Ford pieces would allow you to use 93 Cobra cables. Assuming that your car is a 93. Other years require a FRPP only cable.
For the E-brake cables, the 87-92 cars will use the (2) FMS M-2809-A cables. The 93 model year cars will use the 93 Cobra cables (F3ZZ-2A635-A). You will also need an adjustable center cable; (1) FMS M-2810A
For the E-brake cables, the 87-92 cars will use the (2) FMS M-2809-A cables. The 93 model year cars will use the 93 Cobra cables (F3ZZ-2A635-A). You will also need an adjustable center cable; (1) FMS M-2810A