Okay, here's what I did about a year ago...
1. Found the final Massey ratings for every team after every season since 1999.
2. Weighted them by year (23*2021 final position + 22*2020 + 21*2019 +...+ 1*1999). D2 schools got nothing (sorry, App St).
3. Sorted them into 4 16-team conferences, split into 2 8-team divisions each, trying to maintain existing conferences and rivalries as well as possible, while trying to balance the 4 conferences in strength and make sense geographically.
Here's what I came up with (number in brackets is overall ranking based on step 2 above):
West Conference (average team rating 36.3): Pac 12 plus assorted western teams, K-St because they didn't fit anywhere else.
West 1 (average team rating 38.8):
- 06 USC
- 23 Stanford
- 28 Washington
- 33 Arizona St
- 42 UCLA
- 53 California
- 62 Washington St
- 63 Arizona
West 2 (average team rating 33.9)
- 10 Oregon
- 14 Boise St
- 21 Utah
- 27 BYU
- 31 Kansas St
- 55 Air Force
- 56 Oregon St
- 57 San Diego St
North conference (average team rating 27.1): Big 10 plus Big 12 and some Ohio orphans.
North 1 (average team rating 25)
- 01 Ohio St
- 08 Wisconsin
- 12 Notre Dame
- 18 Iowa
- 25 Michigan
- 29 Michigan St
- 47 Minnesota
- 60 Toledo
North 2
- 02 Oklahoma
- 13 Oklahoma St
- 15 Texas
- 30 Nebraska
- 37 Cincinnati
- 40 Northwestern
- 45 Texas Tech
- 52 Iowa St
South Conference (average team rating 29.1) (SEC plus a bunch of Texas teams)
South 1 (average team rating 29.6)
- 04 Georgia
- 07 LSU
- 09 Florida
- 36 Tennessee
- 38 Mississippi St
- 41 Mississippi
- 43 South Carolina
- 59 Kentucky
South 2 (average team rating 28.6)
- 03 Alabama
- 11 Auburn
- 16 TCU
- 17 Texas A&M
- 32 Missouri
- 44 Arkansas
- 48 Baylor
- 58 Houston
East Conference (average team rating 37.4): ACC and Big East, Penn St and WVU go home, some orphans)
East 1 (average 39.75)
- 05 Clemson
- 24 Florida St
- 34 Louisville
- 35 North Carolina
- 46 NC State
- 49 Georgia Tech
- 61 Virginia
- 64 Wake Forest
East 2 (average 35.1)
- 19 Penn St
- 20 Virginia Tech
- 22 Miami FL
- 26 West Virginia
- 39 Pittsburgh
- 50 Boston College
- 51 UCF
- 54 Navy