I've restored both a 1979 440 Drifter and a 1980 440 Drifter. Although they show different part number on the parts list I believe that they are the same. In my opinion they just changed the parts numbers as the year changed. The illustration for both parts list is exactly the same and from what I remember when they were apart the parts looked identical. Further proof would be the exact ohms from both shop manuals for the coils.