Jensales will have the manuals you need.
https://www.jensales.com/?gclid=Cj0KCQjwlK7cBRCnARIsAJiE3MitacuEM_DiCQx7Qod l3hnDxZY_WJC0znv0a_4BV9Z3GXGo7BlTa68aAsOdEALw_wcB
AGCO is your source for factory parts, but the tractor is so common that the places Steve listed should get you 99% of what you need. Steiner is another good source:
https://www.steinertractor.com
A good trick for getting sleeves out is to lay a bead of weld from a stick welder up the inside of the bore. When the bead cools and shrinks the sleeve shrinks with it.
Which engine do you have? It could have a Perkins 3 cyl diesel, a Perkins 3 cyl gas, or Continental 4 cyl gas engine.
EDIT: I read further in the thread. Looks like you've got the Continental engine.