torque rod??????

im putting a small block in my 74 dart and i need the rod that goes from the tranny to the throttle linkage.being an ex chevy guy it goes on where a kick down cable woud go. Its hard to find something when i realy dont know what its called.my under standing is that this is some kind of pressure rod and i cant run the car without it. I have a torqueflight 727 tranny.