Reply to "clutch adjustment"

Slow, precise shifts are necessary with even a new ZF. It's pretty easy to 'beat' the synchro action in a Pantera or Mangusta. And precise location of the shift stick as described in your red Owners Manual will minimize the problem, along with a good 80W90 gear lube, filled to specs. A long-throw clutch slave cylinder will help by increasing clutch disengagement distance, too. But be aware that NOTHING will replace missing metal from 38 years of synchro wear inside the ZF, except a rebuild.