8 3/4 identify

thinking about picking up a 8 3/4 rear end, has a 489 case posi 3.23, but looked at several sites and cant figure out what it came out of, it’s 48.5 inches from center perch to center perch, any ideas? Mainly want it for the chunck but also was to see how sellable the housing and axles will be that I will not need, thanks