I obviously didn't' know the answer to this one, so I searched for it on Google.
Unfortunately, I clicked on a link which supplied me with an article that provided information on seasons that only had 14 scheduled games. The statistics regarding the seasons with 16 scheduled games were further down in the article. Since I was in a hurry, I did a quick search in the article and collected the information that was closely related to the words the only other seasons to surpass eight 1,000-yard rushers.
Good questions flotsamnjetsam, they are more difficult than they first appear to be.