My dad had an old Ford solid beam 3PH 2 bottom 14" that he used on his Jubilee for many years in sandy soil. We always had problems pulling it, so I found a newer single bottom King Kutter or similar style to try. It has it's own issues and has no coulter, but that thing works great behind the Jubilee. The single bottom does a better job in less time than the old Ford plow. So I took the old Ford 2 bottom to use with my Ford 850 and Case DX55. I really took a lot of time to get it set up right, but it still pulls tough. I'm thinking it is sprung and will never pull easily. Keep that in mind when looking for a plow, in case you can see an obvious twisted or bent frame. This one does have a slightly bent upper frame.
I found an old 3PH Ford 101 3 bottom 14" last fall at my dealer, and got it for $300. I have to cut bolts and rebuild it to a 2 bottom yet, but at least it's mostly intact and has a couple coulters. Wear parts are all good except for the landslide, but I might replace them all now while I can still get parts. I'm hoping it will pull easier than the older ford, and last me forever.