I'm not sure, but I bet doing this would be quite a challenge since the 974 has individual row unit drive chains. You could get under the head (with appropriate safety stands_stops installed, of course) and imagine everything 10" closer. What would hitIJ (gearboxes, stripper plates, etcIJ) By the way, are you aware that NH offers 20" rows on the current production 996 headerIJ Finally, NHDon is incorrect. The NH cornhead and Deere's do not have any parts in common. They happen to fit on each others machine fairly easy, but that's it.