On the 300U it's hitch has the full size sockets. The 3pt. Adapter bars for the post hole digger needs those slide in adapter bars. I can't find the original set we had. My dad most likely loaned them to some body. We had two sets being one set he made from odds and ends. They are 1/2 inch thick, 1 1/4 inches wide, and one is 12 1/2 long and the other is 14 1/4 inches long. Can someone measure their original bars so I can make another spiffy looking set of spacers? Thanks much. By the way, if you are curious those are old telephone arm brace bars that one of his friends gave him maybe 50 years ago. Everything is hot dip galvanized.
bars
bars