The Reds had been battling with Leeds United for the Division One title and the home win over the Gunners proved decisive.
Leeds finished their campaign with a 3-3 draw against relegated Birmingham City, matching our 61 points. Although we still had a game left to play, which we lost 2-1 at Aston Villa, our vastly superior goal difference ensured glory for Matt Busby's men and, poignantly, a first title since the Munich Air Disaster.
Only a defeat by 19 goals or more at Villa Park would have seen United surrender top spot.
Some of the 51,000+ crowd at the Theatre of Dreams invaded the pitch after the final whistle in celebration, with Denis Law taking much of the acclaim.