These are some very impressive lists, of course; every one is in the Hall of Fame save Faulk (first ballot), Martin (likely first ballot), and Bettis (perhaps a bit longer, but he'll get in). And of course LT will be in the Hall.
He has 692 yards rushing (4.5 ypc) and 315 yards receiving (7.3 ypr) this year in 10 games; basically, 70 yards rushing per game, 100 total yards. I think he can keep up that pace for another year, which would give him another 1500+ rushing yards and 2200+ total yards. That would put him within 600 yards of Barry Sanders in rushing, and above Marshall Faulk in total yards. I think at that point he could find a way to stay on to catch Barry.
He could do better than that. Emmitt added over 4,000 rushing yards after age 31. LT has a pretty good shot at passing Emmitt in yards from scrimmage, and could reasonably take the yards from scrimmage title from Jerry Rice. Catching Emmitt in rushing yardage would take a career arc like Emmitt's; staying healthy, having a couple more productive years on the Jets, and then finding a team that's willing to rent an aging veteran for a couple years.