Reply to "ZF parts etc"

Red-Tera, what is your car's serial number? There are several ZFs that may be in certain Panteras either originally or as replacements, and parts for some are almost non-existent rather than 'just' expensive!
There is a transition ZF that uses the lower-geared Mangusta gearbox flipped upside-down & mounted on a Pantera differential case. Piece-parts for this ZF are almost non-existent; Ford scrapped many of these early in production due to the low gearing leading to engine over-revving and many warranty claims. They can be spotted by their sand-cast bellhousings, and two inspection holes up top. THere may be attaching dog-legs from the bellhousing to the diff side-plates. They are usually found on early-serial '71s.
There is a so-called 'super-ZF' that was originally used on very late Panteras and BMW M-1s. It has a cast-on curved plate on top of the diff case that apparently acts as a reinforcement for the ring & pinion gears. None of the innards on this uncommon ZF will interchange with the more common third type, without lots of machining. They were originally delivered with CV-joint axles but std u-joint axles will interchange or can be adapted.
Somewhere in Western Australia was a shop that was once factory-authorized for ZF overhaul, and several Oz-owners have had favorable reports on their work over the years, but I've lost track of their name & location. Have you tried contacting your 'neighbor-owners' in your country on the subject?