Most all of those joints have plastic (nylon?) bushing inserts which is why Ford doesn't say anything about lube. They are not supposed to need anything. They also weren't intended to last for 40-50 years either.
Whatever you use, if you do, make sure it won't dissolve or damage the bushings since they are NOT available as repro items. NPD offers something they say are bushings for one of the joints but those had no resemblance to the original part it was supposed to replace; another item for the swap meet. Personally, I just keep the top frame clean and don't concern myself with any lube. I have driven my 'new' Italian convertible for 40 years now and have never lubed anything on its frame either.