1965 Dart Gas Pedal and linkage

The garage was a bit dark, I am rather surprised the pictures are this clear.In the first photo you can see the linkage coming through a hole that was made for it in the firewall. The heavy rod thats mounted on the pivot on the floor the cut end rests at the mid point of the gas pedal. I guess you can see the rest of the devastation that was done to put a car and a truck together. :p

Let me know what you think, do I want a /6 linkage, v8, or go with a cable linkage. I pretty much want to do the cheapest thing possible to achieve smooth reliable gas pedal operation.