Anything prior to the plastic change to the current design should work. You could make the late model stuff work, but you'd have to replace more parts. Attached are pics of my old 066, and of my 660. Notice in the picture of the 066, how there are two pieces between the filter cover and the main shroud? One being the (in the case of my 066, aluminum) filter base, the other being the plastic carb housing. (for lack of a better term) On a 660, you can only see the carb housing, not the filter base, very much like on your 460. Just be sure to get the orange filter base and a cover, and you'll be set. Just be sure to get the little metal piece that goes up through the filter and has the stud for the cover nut on it, too.