Choosing the correct spring/shock package for any car is an involved process. Best to buy a package from a vendor who knows Panteras and can discuss your specific needs. Call Scott at SACC.
If you just want to check what you have then set the car up so the rear lower control arms are parallel to the ground by making a rigid link to take the place of the shocks. Set in flat to a slight rake at the front and again use rigid link instead of the shocks. That will give you a starting point and a baseline to see how the wheel/tire combo fits the car. Actually ride height and wheel/tire combo choice should be done before flares are fitted.
Front this point check each corner to determine how much bump travel you have. Make sure you check lock to lock at the front. You will have to remove each rigid link to check. Droop will be controlled by the shock length.
To me the car in your photo look like it's sitting high.
