DAYTONA BEACH, Fla. Steve Letarte sat at the Daytona International Speedway conference stage a month ago talking about how 2014 will be a season of last opportunities before he leaves for the NBC broadcast booth in 2015. Last opportunity to work at Hendrick Motorsports, the only place he has ever worked. Last opportunity to win a championship. Last opportunity to win a Daytona 500. MORE: Earnhardt's win | Danica fails | The Big One Letarte made the most of his final Daytona 500 as a crew chief by helping his driver, Dale Earnhardt Jr., to capture the sports biggest racing prize Sunday night at Daytona International Speedway. The whole thing is kind of surreal, Letarte said in the wee hours Monday morning. I dont think Im eloquent enough in my words to describe it all. It will probably sink in, well, maybe never. PHOTOS: Scenes from The Great American Race Earnhardt credits Letarte for lifting him from the depths of the worst slump of his career, which included two finish...