Hmmm That looks like a G.M. throttle valve cable to me.
My 4 bbl. is a Holley but I just added a curved slotted bar from a /6 and it works great.
it could be gm, I don't think the throttle cable is the stock one, it seems too long to me! I did get time to change it around today, but it, drives smooth, but steel likes some getting full throttle & I am goin haft to adjust some more on the kickdown to get the passing gear to work!
Also the throttle cable would not go on the stud because it had a nut in it that I had to take out to put it on the stud!
