Hy 46Canopy, 230s and 250s look identical on the outside, they even have the same bore, the difference is in the stroke. If the engine is 1975 or newer it will have an H.E.I. [High Energy Ignition] distributor [large cap, with wires in a retaining plate] if it has a point type distributor then the tuneup parts should be the same regardless of which displacement it is, hope that helps.