Have you got the new tie-rods in hand? The ones being sold as replacements have a straight shank that will drop in the steering arms without any reaming or tapering. And as Kevin just said, the holes are hour-glass shaped, so you need to remove enough material to get the lower peened over portion pushed through the center of the arms. Doing this on the truck isn't going to work, the arm needs supported right at or near the ball end. Even with drilling, they are still wedged in there pretty good. The factory install is very much like a rivet, the whole stud is smashed into the arm to fill all the voids, it's not just the end thats holding them in. The replacements will work just fine with the factory hour-glass holes. DON'T try to remove them on the truck!
