In the last 27 years (yes, after 1984 and 1985) here's how many Top 25 finishes some of the B12 teams (and BYU) have:
Baylor - 2
Texas Tech - 7
Oklahoma State - 8
TCU - 9
WVU - 10
BYU - 11
KSU - 12
I didn't bother looking up OU, Texas, Kansas, or ISU.