Finally got the upper nut cut off. I started from under the car and then went in through the top of the trunk. Took a lot of prying to get this far – can’t figure out why the bottom bracket stayed on the bolt!
Finally got it removed from the rear frame rail:
Created a small mess that needs to be cleaned up! Now you can see part of the reason I went in through the top:
Here is the view from the top of the trunk:
Used the Plasma cutter to prep the driver’s side for cutting (luckily the trunk will be removed for new metal later so I can remove what was in the way!) – before and after: