54 up takes the one-peice cast link. Maybe even from 52 I'm thinking now. Those adjustable ends are crap and hard to deal with later. They wear out too! I took my steering arms and pitman arm to a race car suspension place and they used new Chevy tie rod ends and both peices were tubes and could be adjusted. Really no reason to adjust the link, just that I didn't have the exact dimension at the time. These new ends are all tapered, that's why they had to work them, for the taper to match the new tie rod ends.