upper ball joint replacement

If it is just turning, I think the threads are shot. How hard is it to turn? I am not a suspension Expert, but I have done quite a few Mopar front end replacements. The threads on the ball joint and in the UCA are quite fine. It is not uncommon for the last person who installed a ball joint to have either cross threaded it and then over torqued it or possibly have pressed it in, not knowing that they were NOT press fit. I believe you have 2 options. 1) Find a good used UCA and use it. 2) Get your ball joint out, and weld a new one in. I've had my 69 Barracuda for over 30 years now, and i have done two complete restorations on it. The first time (it was a rough basket case when I first got it), was before internet, I had the same problem, and I was having trouble finding a used UCA. I used an impact wrench and eventually spun the ball joint to get it loose enough to get it out. Then I forced/pressed a ball joint all the way into the UCA and welded it in. Nothing wrong with that at all. It lasted about 20 years. After that, I blew it completely apart to paint it again, and easily found a good used UCA on the internet.