steering coupling

There are 2 different input shaft diameters so there are 2 different couplings also.
I can never remember exactly what year the varios changes in steering parts happened.
There is a combination of mixmatched steering gear and center link that there isn't a pitman arm made that will connect the 2. :(
If you have to move the coupling from on shaft to another you might consider purchasing the rebuild kit for the coupling. Another twenty-few dollars to spend.