That's something I can't tell you, whether it's a wc or wd I don't know crazy lot about Allis Chalmers.I was looking closer at your tractor, it looks like it could have been a westendorf loader. As popular as it was to reverse those tractors, it would not surprise me if a loader company such as westendorf or somebody like that made loaders especially to fit them. I will ask my brother about them. You owe me because he goes into excruciating detail on the history of things lol