Just in case, follow these directions. Go to http:/www.agcopartsbooks.com and look to the right hand side for the "Guest" button. Press the guest button, and you will go to the next page. In the search area near the top, enter "12 tractor" and pick "Massey Ferguson" as the brand. Run the search, then find "12 tractor " from the results. Click on that, it will bring up a parts listing for the massey 12 tractor, both hydro and gear variants. Click on the "transmissions and clutch controls for the information I am attempting to put in a file for you.
Here's a picture if it's still any help to you.
The red line shows how this one was bent, before I straightened it and gusseted it.
I have another one, that is mostly just a carcass, and it's bent like that too.