Reply to "ZF Adjustment for Reverse"

First, lets be very sure you are getting full clutch disengagement. Reverse is the only gear in your ZF with no synchronizer, so this is exactly what happens if the clutch hydraulics are beginning to fail. Step 1- with the engine OFF, get someone to put the clutch pedal flat to the floor and hold it. Step 2: go back to the rectangular access hole in the bellhousing and stuff a feeler gauge in between the flywheel and clutch disc. A reading of 0.030" is ragged-edge marginal in a completely stock Pantera. Any less and you are dragging the synchronizers on each shift, and grinding in reverse. Dragging synchros will wear rapidly, and replacement is expensive beyond belief.
Once you know the clutch is releasing sufficiently, and the linkage is all adjusted per your red Owners Manual, simply shift to 2nd before shifting to reverse and see if that works any better. Finally, there are bronze linkage pieces inside the rectangular aluminum box on the drivers side rear of the ZF. There is a metric setscrew inside that MUST be tight for reverse to select properly. A ZF shop manual is a must for this, though.