UCA bolt help!!!??

So I’m working on swapping coil overs today. Using this thread as a guide https://www.tacomaworld.com/threads/how-to-front-shock-spring-removal.31862/

going ok until I got the spindle separated from the UCA. Now when I turn that castle nut, the whole post up into the UCA spins.
What can I do here?!
Thank you for help.

 

Well I got it. Had to move the LCA around to relieve tension on the nut.

 

For future reference. You don’t need to remove this to replace the coilover. Just unbolt the lower ball joint from the spindle on the bottom and the sway bar.

 

I was following the steps in that thread I reference in my original post. It read really straight forward, and others chimed in about that method working well for them.
I saw the other method about undoing the lower ball joint, but it looked more complicated in a quick read. Having tried doing this, the lower ball joint method looks much easier. Hindsight I guess.