'25 T with Mustang power steering leaking

I recently purchase a 25T with 289 Mustang engine and tranny, Corvette rearend and 4 wheel disc brakes. I received some information from the seller but 1/2 of it was incorrect. The car was built, I assume, in the late 60s as it has mostly late 60s parts. The power steering is leaking everywhere but I do not know how to identify what it is and what year it is to obtain replacement parts and kits. I assume it is Ford. Where do I look for part numbers and how do I determine year model? I would prefer to have the replacements parts in hand before taking the existing system apart to minimize downtime and have fewer extra parts left over because I can't remember where they went. Thanks for any information and suggestions.