That's about my time frame as well. I remember the game with LSU on TV in the NIT when they had Pete Maravich. He was an incredible talent, and they still only beat OU by three points.
My first live game wasn't until my senior year of high school. My folks were at OU when basketball was awful, so they didn't have much interest in going to the games at the Field House. I was 18 most of my senior year, and knew I was going to OU, so I drove up with a friend to see the 1976 Bedlam game at the LNC. That turned out to be the very first win for OU in the then-new arena. OU won, 57-42, and at the time it was the largest crowd to see a home game at OU.
That night was more famous originally for being the night that OU got its 1975 national championship trophies from AP and UPI. But I also think it woke up some people about basketball, since Bliss' young and undersized team was starting to play well. They beat heavily favored, nationally ranked Missouri fairly easily a week or two later, at the LNC, then won at Kansas by a point when that was considered an impossibility.
Although they won only nine games that year, they played decent ball in the league. Bliss signed the Curry-Stotts-Beal led class in the spring of '76, and those in my age group started thinking we could be pretty good in basketball for the first time in awhile.
+1