Ford led the final Daytona 500 practice with Brad Keselowski pacing the field as he attempts to snap a 15-year winless drought Sunday in “The Great American Race.” Keselowski has long struggled at Daytona International Speedway, where he’s typically a contender but gets caught in the carnage that is common. The field is jam-packed at 41 cars, the most entries in a decade, and if the Daytona 500 is anything like Saturday’s crash-filled ARCA Series race, it might get messy.