I would save the alternator and starters, as if they work, they probably will 5 or 10 years from now.
The water pumps and master cylinders, save them if you want , dont expect them to work. Master cylinders need to be sealed as brake fluid is hygroscopic, meaning it absorbs moisture from anywhere, including the atmosphere. If it sets, on the shelf ,un installed, it no doubt will turn to crap, as it ill rust.Never use oil on any part of a master cylinder or brake system.
The water pumps may be OK a few years from now . The master cylinder and water pumps would be OK to keep for a core, or exchange when getting a rebuilt one.
Fact is stranger than Fiction