Anybody know Ford’s, here?

Don't hate. I was asked to change power steering pump on girlfriends folks 66 Mustang, 289 v8. From my online research the car has an Eaton pump, their son in law ordered a replacement and the replacement is a Ford/Thompson pump. I don't know what will interchange on Ford's. From what I could tell I would need different brackets to use the Ford/Thompson pump. Any thoughts? Any good mustang forums? Or do I just wash my hands of the whole works and tell them to take it to mechanic?...

Anybody know Ford's, here?
Author: coffeedart67