If you don't have this info. You will need it latter. Someone might come along that has had your same experience. I searched the site and really didn't see the same problem.
I was able to turn the front half past the tabs. I used a bar between the studs for leverage. Keeping in might the studs might rusted. It did take some light persuasion with a hammer. But it did turn apart.
That was my thoughts also. Trying to read between the all the lines. Both of them! Text and assembly. Think it might have been done sometime in the paint line. Just might have been done at Clairpointe?
Come up with a name of the material and you will probably find it here. There are a few others.
https://www.thomasnet.com/browse
https://www.thomasnet.com/browse
https://www.mcmaster.com/
My 2¢. With the car somewhat level. I would pull the carpet back. Place level on tunnel for reference and match. Place bracket on the back side of the hump on the tunnel. As seen in the picture. Then level as check prior. Mark and drill small hole to start. Put screws in the holes so you know...
E Body Assembly Sequence
ASSEMBLY SEQUENCE:
(some variation with different body types)
(from bare painted body shell)
Spray radiator saddle blackout
Rocker panel pinchweld blackout (if applicable)
Front frame rail side blackout (if applicable)
1. trunk weatherstrip
2. body rubber bumpers
3...
Completed instrument panels are sent according to Sequence Number by overhead hooks to their installation point on the Trim Line. Sometimes a highlighted broadcast sheet is taped to the glovebox or is stuffed above it by the Instrument Panel Department workers. These sheets may remain in place...
Now is a good time to illustrate one of the assembly line problems caused by the special-ordered SuperBirds. Our tour guide through time, Engineer Gil, distinctly remembers one SuperBird that was painted a color not allowed for SuperBirds.
Every dealer announcement for the SuperBird, and every...
Assembly of the body shell begins by laying the sub-assembled passenger compartment floor and forward frame rails and the sub-assembled trunk floor and frame rails onto a moving floor-level "truck" fixture. To either side of this floor pan fixture are secured (a short distance later) massive...
Chrysler assembly line
How Chrysler Built Cars
Few Mopar enthusiasts have ever seen an automotive assembly line. Fewer still saw the assembly of Mopar muscle cars. Almost no enthusiasts active today in the hobby worked at Chrysler those many years ago.
Imagine the wealth of memories a...