[Hatz]

As far back as the khsaa scoreboard goes back , 4 classes was always the way they went before the 6 class thing came about.

I think there were three classes from 1959 to 1970-something

From 1959 to 1974 there were 3 classes.  

Then they went to 4 in 1975 

For a few years 4A was divided between a Jefferson County tournament and an At-Large State Tournament.  The two winners would meet in the Class 4A final but kept the distinction of being the "At Large Champion" or "Jefferson County Champion" despite the Finals outcome.