'66 Barracuda front end rebuild

You do have the clip removed from the rear of the torsion bar, don't you.
I have only ever ran across one car that i couldn't get the torsion bars out, at a wrecking yard.
Wound up going back with a battery pack grinder to cut the torsion bars in half, before they stopped letting you use grinders, due to all the sparks, and fire hazard.
Anyway in your case the official torsion bar removal tool, might me necessary to whack on, in getting the torsion bars out.
Or keep prying between the crossmember and the LCA, and then hoping that it comes out.
Or hitting the shaft in the front of the crossmember, with a hammer, or the side of the LCA itself, with the hammer.
Good luck.
Don't F up the threads on the front of the shaft.
Put the nut on backwards, flush with the threads, and try the hammer method.
Don't whack on the LCA too hard putting lots of hammer marks in it.
Possibly a block of wood between the hammer and LCA.