After you get the rubber out of the LCA, you can weld a washer to the bushing and push the bushing out with a press. (If you have a press)

I was always told it was ok to use poly in everything but not the LCA (use rubber)because of possible squeaks even with lube on them.

Use penatrating fluid up to a week before on the torsion bars and Upper control arm bushing.

Might want to weld in the lower control arm reenforcement plates that mancini sells while you have them out.