I have attended over 400 games over the 50 plus years, so it is difficult to pick the best win and most heartbreaking loss but as far as the win, it had to be the Dolphins beatings the undefeated a Bears and giving them what turned out to be their only loss of the season.
The worst loss was against the Chargers. Miami came back from a 24-0 deficit and then had the chance to win the game with a FG in overtime. The FG was blocked and the Chargers went on to win the game. So many highs and lows in the game that walking out of the stadium after the game I was completed drained.