The best cable operated system I have seen is the Leyland MINI from the 70's and 80s. These things are really a quality item from LUCAS, the God of Darkness. (you pommys out there would understand that one) The only problem with this unit is the drive motor a little large and prone to rusting inside. So check the inside before you buy. Unscrew it and look. I have bought a few duds before now. I have fitted one of these units to a 36 chev sedan so your implementation shouldn't be too much different. With a little bit of fettlin' you can squeeze one of these guys in and they work well. FAST SLOW and return to stop. What more could you want. I would suppose they probably even still make spares for them.

Good luck,
Andy.