I assume my ebody (72) uses the same ones?
Your ’72 E-body has a similar appearing wiper transmission system – but it doesn’t use the same type (plastic) bushings. It is more of a metal on metal system that also has metal retaining clips to hold it all together. It does need some lube on it occasionally, or it will squeak. There is no way for it to “break” or “come apart” except for bending/breaking things when things are frozen over . . . well, except for the wiper motor arm (and hidden wipers). If I recall correctly – that can be a pain to find a replacement for.
The plastic bushings that FMJ’s use is a lot simpler and system is cheaper to manufacture. Also, is quieter – but you do have replace those bushings every few decades.
On any F or M-body, if you are looking at the wiper motor arm and it also does not have the same bushing there (uses three of same bushings instead of four) – I highly recommend you find a newer M-body and get the wiper transmission from it – for finding parts for the older style motor arm is rather difficult and troublesome. You only need the arm off wiper motor and the link that attaches to it – but it is just as easy to remove the wiper transmission (both arms, both pivots and motor arm) at same time and it most likely will cost you the same $.
The Pull-A-Part near me just got in a ’89 Fifth Ave, which getting the wiper linkage is on my list to get (to sell).
BudW