Sway bar bushing install help needed.

The easiest way to replace bushings in those sway bar brackets, is to cut the weld, and then bend the bracket back, a little bit, to install the new bushing.
Then clamp it back down, reweld, and your done.

That's the way lots of people get that job done.
Any other method is a big pain in the ***, prying, twisting, shoving, and most often doesn't work.
Good luck, your going to need it, if you don't cut the weld.

My 2 cents on the subject.