Chase Elliott and Dale Earnhardt Jr. — teammates and sons of Hall of Fame drivers — will start 1-2 and should give a sagging series a sorely needed boost this week headed into its marquee event. Elliott nipped Earnhardt on the final qualifying lap Sunday to win his second straight pole for the Daytona 500. Elliott turned a lap at 192.872 mph to just edge Earnhardt’s speed of 192.864 and become the first repeat pole winner in 27 years. Earnhardt, long NASCAR’s most popular driver, had the speed to beat in his triumphant return after missing the second half of last season with a concussion. Elliott and Earnhardt gave Hendrick Motorsports and Chevrolet a 1-2 front row for the fifth time in the Daytona 500. Elliott, the 21-year-old son of Hall of Fame driver and two-time Daytona 500 champion Bill Elliott, became the youngest Daytona 500 pole winner a year ago and proved in the No.