Once the 4 screws that hold it to the firewall were out and the strap collar nut was loose, I had to pry a bit with a screwdriver between the metal "boot" and the firewall to get it moving and eventually, I grabbed it and twisted it up toward the steering wheel.
There was also a rubber gasket that was almost fused to the firewall.
Be careful, the edges of the metal boot are sharp.
Maybe a shot of nutzoff or WD-40 will get her moving.
Good luck.
You'll love the results!