Another Aussie joins the herd! Welcome, Eric.
When the opportunity arises, please post up a photo and share with us the vintage of your donor R65.
Good idea to locate a shop manual. A Haynes or Clymer, or even both, as each publication may do a better job describing a specific operation than does the other. And prior to grabbing a bigger hammer, post up questions beforehand. The Airheads are simple tractors but there are correct ways and expen$ive ways of doing things.