I came across this online recently. It is all the KHSAA magazines from 1974-75. Assume others are out there just haven't figured a way to find them all. This page is for the playoff brackets. You can move page to page to see other stuff.
The Kentucky High School Athlete 1974-75, Volume 1974-75, Page 83 | Document Viewer
What is amazing compared to today is that prior to 1974 everyone outside of Louisville competed for 2 state championships. In 1975 they went to 4 class system. you can find the 1975-76 alignment on page 43.
The Kentucky High School Athlete 1974-75, Volume 1974-75, Page 83 | Document Viewer
prior to 1975 you could have 10 teams in your district and only 1 team made the playoffs.