Race track chaplain Max Helton said the late racing legend Dale Earnhardt prayed with him before this year’s Daytona 500 — as he did before most races.     At Earnhardt’s insistence, Helton generally joined him on the track near the racer’s black No. 3 Chevy for prayer.  Hours later, the 49-year-old Earnhardt would be dead, killed when his car hit…