Tell your injector pump shop to recheck, the drive shaft off the G is exactly the same as a 200. The only difference is the gov setting -you will not know the difference - and the electrical shut off. If they doubt it go to agcopartsbooks.com and look it up. AC on the DB pumps used only 2 pump shafts the blade or flat tip drive 74061581 for 2 roller pumps and the splined type 74055692 - 4 roller pumps - d21 210 220. No combines used 4 rollers Db pumps . Gleaners with the exception of A,C,G,F's used the DM (ball bearing on drive shaft) pumps where the fuel lines exited at a 45 degree angle and were not banjo type fittings. DB pumps had a brass sleeve that surrounded the pump drive shaft. Anyway, someone is confused here on this issue. Hope this helps.