Now that two of the Big Three automakers have survived bankruptcy and returned to profitability, the United Auto Workers say they want the concessions they made to help that process paid back in the next union contracts — with Ford in particular. Ford did not join General Motors and Chrysler in bankruptcy, but autoworkers still made significant concessions in pay and benefits to the company to help them survive difficult times. And after two years of large profits and major bonuses to executives, the UAW says it’s time to restore those cuts: As the UAW prepares to head into labor talks this summer with the newly profitable Detroit automakers, several top union leaders say a showdown is brewing over this year’s contract — especially at Ford, which has made $9.3 billion over the past two years.