Biggest problem with replacement shocks is, NO ONE makes an exact replacement for the nearly 40-yrs-out-of-production Pantera. And the ones that fortuitously DO fit (or can be made to do so), are often designed for front engine cars, not mid-engined like the Pantera.
So the rubber bump-stops on- for instance, gas charged Konis- should be switched front-to-back. The short rubbers should be in front where more travel sifter damping and lighter springs are normally used. And if the shocks you want have different valving front & rear, the stiffer compression valving should be in the rear where 60+% of the weight is..That's opposite to front engine setups.