Preece ready to race at Darlington after frightening Daytona crash

Preece spoke publicly for the first time since his crash at Daytona.
Preece was cleared to drive in the Southern 500 at Darlington.
Preece said he is not sore from the crash, although he has some injuries.
Preece described his crash experience and emphasized racing safety improvements.
Preece expressed gratitude to safety personnel and the need for toughness in racing.