Generally, removing the nut from the strut rod at the lower control arm will not be enough to allow you to remove the strut and replace the bushings. Everything has to move rearward which involves loosening the torsion bar adjusters, removing torsion bar clips, loosening or removing the lower control arm nut and prying the LCA/torsion bars to the rear. If you have to do this then there's really no reason to disconnect the strut from the control arm. Remove the nut at the bushing, pry everything to the rear till it clears the k-frame, replace the bushings, pry everything forward again. Tighten all nuts with the suspension loaded and don't forget to replace the torsion bar retainer clips. Count the turns and/or threads before loosening the torsion bar adjusters so that you can return them to their original position.
Even if you remove that strut nut at the LCA, it's a taper fit into the LCA. I assure you, it won't be easy to separate.
