IIRC, rear springs went from 2 1/2"x52" to 3"x60" in 1994? Even if you found an 8.75 (last used in 1974?) diff I think spring perches would be hurdle #1, then shock mounts and driveshaft, can't recall if it needs to be longer or shorter. There's nothing wrong with the 9.25", I'd keep it.