In front of a packed Albert Ali Gymnasium, Nevada Union did something that no other girls basketball team has done in the last seven years — dethrone Del Oro. The Lady Miners clinched the 2013 Sierra Foothill League title Thursday night, beating the seven-time reigning champ, 70-67. “It feels amazing,” NU head coach John McDaniel said. “To win the first SFL title since we’ve come into the league, it’s just so much fun. We knew it was going to be a great game. We didn’t know how it would end up. We knew it was going to be huge and …