Don't worry about seperating the tie rods from the centerlink...just get the centerlink off the pitman arm and unbolt the idler from the frame, the spindles are already off the tie rods, so thats good too, the whole linage will drop once you get that one joint seperated.
That said, have you tried tapping a pickle fork in between the pitman and centerlink to provide some spreading force to hold the stud stationary for you to crank the nut off without the stud spinning free? If the impact doesn't work, that might...if not you should be able to cut the nut off. If the stud is spinning that free when you try to turn the nut to loosen the linkage, then it's very good to be replacing it. Generally when the stud spins easily the joint is VERY VERY VERY worn out. You should notice a big improvement in the steering when you have this done, and then, like me, you'll want a new steering box [img]smile.gif[/img] .