A body 8 3/4 rear axle housing

AFAIK
If you use the wrong year housing for the chassis, the hose will either; not hook to the fitting or it will not anchor on the factory bracket.
You cannot install a wrong year hose onto a wrong year housing.
So what this boils down to is that if the hose fits on both ends then the housing is correct for the chassis year.
AFAIK
Somebody correct me if I remember this wrong.