Doing a little research to try and answer Mark’s question in the OP, I did discover this.
In December of 1990 The Southwest Conference was talking to Louisville about joining.
“A plan is being bounced around in SWC circles -- and it better bounce to the forefront quickly -- that could add two members right away and then two more teams eventually for a total of 12. It would enhance basketball without hurting football. If done correctly, it could even help football.
Here's how the plan would work. The SWC already has been in contact with two members of the dying Metro Conference -- Tulane and Louisville -- which is down to four members. Other SWC targets for full membership could be New Mexico, BYU, UTEP and-or Tulsa.
Louisville, which is a bona fide football school now, would go into one SWC division with Baylor, Houston, Texas A&M;, Texas and Texas Tech. This would be the so-called strong football division, and the winner would retain its affiliation with the Mobil Cotton Bowl. Tulane would go into a division with TCU, Southern Methodist University and Rice and perhaps New Mexico or Tulsa. It would be a junior football league and could have a minor bowl tie-up.
There could be even a 12th game, a title matchup between the strong and the weak football divisions, a la the SEC.”
https://www.baltimoresun.com/news/bs-xpm...story.html