Bent Frame - Reality Check

[SBC]

I've begun to investigate why my Nova is high on the passenger side.
What I have found is a bit overwhelming.
Obviously the car has been rear ended on the right side.
The end of the right frame rail is 1/2 inch higher than the left.
The two attached pictures show the damaged rear cross section and the bent unibody frame.

It appears to me that the entire rear end sheet metal needs replacing.
I have a new tail light section already and can order the wrecked cross member. Quarter skins and outer wheel well need replacing also.

So - the plan is -
Remove the leaf springs. Support both frame rails at the hump.
Trunk pan is partially removed already.
Remove the wrecked cross member.
Cut the bent trunk flat section over the frame to allow the frame to bend down.
Cut the frame right in front of the bend and pull it down 1/2 inch (even with the left frame)
Weld up the frame rail.
Then refit the new cross member.
And work up to the tail light section.

Any suggestions beyond that?
If there's an easier way - I'm listening.