Not sure if these are special or not, “big hub”. anyhow When I get some more time off work I’m planning on hitting them up with some pool sand then hose them down with a bit to f black rattle can. At that point pull the diff covers and have a look as to what ratio is labeled in the ring gear. The pinion seal on the rear diff is already leaking a bit so that will have to be addressed as well. Lots of work to do and plenty of motivation just lacking the time off of work.