Starting in 67 there was no difference between the \6 and v8 center link. The 66 an older a-bodies with a \6 had a striaght center link that would not clear the oil pan of a v8, the v8's have a drop in the center. The 67+ center link all have a drop in the center and the 73+ has less drop because the idler and pitman arm mount from the opposite side but the center of the bar is still in the same place.