Accelerator pedal assemblies

[212004830]

Anyone use later model cable operated C10 gas pedal assemblies in their trucks? I have a '79 pedal assembly, throttle cable and brackets and feel the response will be better and safer than the rod but worry about where to mount it on the firewall and relation to the floorboard. Already using the Q-jet from the '79 so everything matches in the engine bay.
Found someone did something similar with a '72 pedal assembly in a '60 but when mocking mine up I worry I dont have the full throttle movement to get to WOT before the pedal hits the floor.
'65 GMC