Spent a half day Sat and most of the day Sun removing the 2nd subframe bolt.  Now both back bolts under the seats are removed:

Then I started on the firewall brackets.  Used the Plasma cutter to enlarge the holes and worked on removing the cage that holds the nut.  I didn’t get the cage removed, but think I have it out of my way for now:

Passenger side:

Drivers Side:

The plan for next weekend is to use the grinder to grind down the nut enough so I can remove it.  My cut-off tool is to big to fit, but I think I can get the grinder in.  Should take about a day per side to remove each nut.