Yes, University Heights won a championship earlier in the 90's. The difference being that they were a private school and could attract students from anywhere.
Shelby Valley is a public school. Interestingly, Shelby Valley's coach, Jason Booher, survived the deadly 1981 Carollton, KY bus crash that killed 27 children. His best friend Chad Witt was one of the victims. Larry Mahoney, driving drunk, drove 5 miles the wrong way on I-71 and crashed into the bus which was returning from a church outing at King's Island Amusement Park.
http://en.wikipedia.org/wiki/Carrollton,_Kentucky_bus_collisionThe mother of one of the victims founded
Mothers Against Drunk Driving.