Peter, there are constant-contact throwout bearings that are designed to have long life with the throwout bearing adjusted to always touch the clutch release fingers. The real problem is, the Pantera clutch mechanism was designed with barely-adequate clearances in the whole system when brand-new. Wear, tiny leaks, non-stock parts or even using soft flex-hoses that expand under pressure may cause clutch-drag.
FYI, the clutch pedal position is adjustable by slightly varying the master cylinder rod length up under the dash. This is NOT a fun job!
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