One thing I would really like to see are some REALLY obscure shows from these periods. I don't know a whole lot myself, but I can suggest a few. They may be hard to get a hold of, but even in raw Japanese some really obscure and under appreciated shows would be great to have in the Nostalgia Room. Here are a couple I know of:
Moon Base Dallos
Bavel no Hon
As for the more well-known stuff:
70's and before:
Hakujaden - widely considered the "first" anime.
Heidi, Girl of the Alps - Isao Takahata's breakthrough show, started the whole "World Masterpiece Theatre" phenom.
Future Boy Conan - Hayao's Miyazaki's sci-fi adventure show, would love to see some of this.
Mazinger Z - Mazinger 'nuff said.
Gatchaman - another classic.
Yamato (this might be 70s, not 100% sure)
Night on the Galactic Railroad
Tale of Genji
Ranma 1/2 (is this 80's or early 90s?) marathon would be fantastic!
Otaku no Video
Eva (of course)
Serial Experiments Lain
Crest of the Stars (and the sequels)