I'm pretty sure that was 1975 - I attended that game because I begged my dad to take me. He finally relented and we drove to Minster from Maria Stein. I think we arrived late.
Anyway, with the score 8-7, I believe ML had a 4th down very close to the goal line late in the game and hc Jim Lippincott opted for a td attempt rather than a fg. The Flyers were stopped.
I recall ML qb Frank Griesdorn throwing his helmet in frustration at some point very late in that game - he did it on the Marion sideline. Tough loss for the Flyers.
Lippincott coached at Marion for two more seasons - he eventually became Director of Football Operations for the Bengals.