I would have to give dads 400 a honorable nod. It should probably been the first pick, just because of all its work it has done and its reliability over the years. Dad bought it at an auction sale back in the mid 70's. It was out in the junk line with the transmission cover off. He bought it, put some shift forks in it, swapped out the narrow front for a row crop wide front from the salvage yard and put it in the F10 loader that had been managaed by a 60 john deere of my grandpas since the late 50's. I can remember as a kid riding in that big scoop going from lot to lot while we did the feeding. It always started right up day in and day out. Feeding cows to cleaning barns and pushing snow in the winter to stacking hay all summer with bucker basket on the f 10 in the summer. In 81 dad bought an 851 baler, so its work load got cut back in the summer time to stacking bales. In the early 80s we parted out his 900 case and we put the front axle on the 400, no more broken spindles after that. In the late 90's we retired the old F10 cable farmhand that my grandpa had bought new in the early 50's with an F11 front end loader. It is still in this set up today, but we don't use it anymore. In the one picture it is pictured beside the neighbors sc case and F10 loader. If I remember right, I think we used the neigbors loader for two days while dad put in a piston and sleeve set and new clutch. Over the years we put in a handful of clutches and I think he put pistons and sleeves in it two or three times over 30 years of service. It is in one of dads shed to this day, earning a much needed rest.