You won't find an actual kit that has everything you need. But most everything you need can be found from various suppliers.
For things like pedestals, bell cranks, etc, check with
Inglese Induction Systems - Weber Carburetor & EFI Induction Systems . The cable can be had - as you know - from just about anywhere. I use a Lokar steel braided. Some people have had trouble wih them, but I'v been lucky.
You'll probably find it easier to run the cable in from the front of the manifold. Depending on how your throttle pedal is set up, that might make for fewer bends. I have seen it run off the back side of the gas pedal, behind the dash, and through a hole in the firewall directly behind the intake manifold. A very clean set up, and easy to do.
Circled in this picture is the throtle cable holder I made out of scrap sheet metal.
The two parts marked here are the hex shaped throttle arm I made out of 3/8" hex alum, and the bell crank base I made out of 1" hex alum.
