Ah, brakes!
when I was getting my, at the time, recently acquired S2 land rover ready for MOT after 5 years off the road I discovered that the front, left hand brake back plate was on the right side hub and visa versa. I have no idea if they ever worked properly like that but the shoes were well worn.
I purchased a single replacement back plate from ebay which I stove enameled and rebuilt with all new parts before swapping it for an incorrect one then rebuilt that one to finish the job.