DETROIT — Will Power was putting on a dominating performance in the final IndyCar race on Belle Isle’s 13-turn, 2.3-mile street course Sunday afternoon, leading the Chevrolet Detroit Grand Prix by 16 seconds after returning from his final pit stop with 20 laps remaining. The only question was could Power hold on to the lead in his No. 12 Chevrolet for Team Penske? Power did, defeating Alexander Rossi who was driving the No. 27 Honda for Andretti Autosport by one second for his first win of the season and third on Belle Isle, matching the record three wins on the island by his former teammate H…