A partnership between Kushner Cos. and Aimco has acquired a development assemblage in Fort Lauderdale for $49 million and plan to develop Fort Lauderdale’s tallest tower. The development partnership acquired a 1.87-acre site at 520 W Broward Blvd. for $35.5 million from Swire Properties as well as a 2.31-acre site at 300 W Broward Blvd. for $13.5 million.