of playing dime or nickel go for it.
Pinkel was 4-3 a long time and completely while Steck was DC.
Here is Odom saying he will stay with the 4-3 that steck ran when Odom took the DC job:
https://www.stltoday.com/sports/college/mizzou/eye-on-the-tigers/odom-eager-to-put-stamp-on-mizzou-defense/article_e2c47f8b-7c01-5b83-a30b-72812a137b32.html
The only significant tinkering with 4-2-5 under steckel was vs oSu in the cotton bowl. If you go back and read all the game recaps under steck, Mizzou was a base 4-3.
And if you want to go back further and read all the game recaps from when GP first arrived, you will see the 4-3 was implemented a couple years and didn't go away.