Here's a photo of the setup I used to remove my old torsion bars once I had the spring plate off:
https://ibb.co/Zx1gzN0
The wooden clamp is called a "wood handscrew clamp." It's a great tool to have around, but I just about beat it to death taking the second torsion bar out. It's still clamping, though. I ended up wedging a screwdriver inbetween the body and the outer part of the jaws to get the angle right. Took about half an hour of banging to pull it.
On my second time around doing the disassembly, I was able to remove the shock absorber, pull the caliper, separate the spring plate, take the spring plate off, and take the torsion bar out in 3 hours. Took me several garage sessions on the other side. Hope your spring plate bushing project is going well Pedro!