With NASCAR and the Coca-Cola 600 the promised priority, Kyle Larson will again attempt the Indianapolis 500 next season with the caveat he must leave if rain again ruins his bid to complete “The Double.” “It was unfinished business,” team owner Rick Hendrick said. Larson was a total star all of May, where he qualified fifth but a late-race speeding penalty took him out of contention and he finished 18th.