By Jennifer Piacenti The 76ers are now +650 to win the NBA title at SI Sportsbook following their blockbuster trade to acquire James Harden from the Nets. The 76ers’ title odds have jumped dramatically at SI Sportsbook after their blockbuster acquisition of James Harden from the Nets. Philadelphia’s odds have been sliced in half to +650, the fifth-best mark in the NBA and third-best in the East behind the Nets (+425) and Bucks (+600). Philadelphia entered the day with the seventh-best odds to win the NBA title with +1300 odds. The 76ers also now have the second-best odds in the East at +240, y…