What's the biggest lead the Rams have blown?

My other post about "Lows" as a Rams fan, someone post that DREADED MNF game vs the Niners in 1989. I know the Rams blew TWO 17 point leads that night. But the game I recall was in the early 80s. The Rams were playing at Green Bay. The Rams lead 23 to 0 at the half but the Pack scored THIRTY FIVE second half points. I remember that day well. It was not on TV but I saw the halftime highlights during another game. I figured it was safe to go to the sand lot game down the street. As we were playing, I'm thinking the Rams are gonna win 40something to 10......Then I got home and saw the score at the half of the later game. RUINED MY DAMNED DINNER!!! LOL