The Daytona 500 finally got going yesterday, after being rained out on Sunday. Then with 40 laps to go, Juan Pablo Montoya crashed into a maintenance truck during a caution lap . . . and the truck was carrying a jet engine they use to dry out the track, as well as 200 gallons of JET FUEL. It caused a fireball, and the race was delayed for two hours. But Montoya and the truck driver were both okay.