I know that 1/2 ton steering arms have straight holes for the tie rod ends with a small chamfer on top an bottom. The ball studs also were straight and swedged in place. Apparently, larger trucks have tapered holes (see Filling Station PN SA-154) That reference says the stud is 0.532 diameter, but doesn't say whether that's the big or small end. From the dimensions of the tapered holes in your steering arms, it appears they may be wollered out. I would guess if that's the case the holes would be oblong. I'm not sure of the taper dimensions of more modern tie rod ends, but that might be an option. You may have to ream the holes with a taper reamer to fit modern tie-rod ends.
Like WICruiser, I also had the boots on the replacement tie-rod ends I used split. I replaced those with a boot from Energy Suspension.
