Good points Bosswrench.
I love hearing the history of Pantera issues, cures & modifications.
My negative camber issue is the top arm going past horizontal.
This is due to lowering the car so much due to the large wheel diameter.
As the car lowers the top arm arcs inward & progressively throws the rear into negative camber.
Here is a picture of my engine bay brace.
The rear attachments connect to the old bumper mounts.
Although I’m going to have to gut out the engine bay for the new engine, which gives me the opportunity to reinforce these areas & add bar work as required.