The 22-year-old Vargas from La Mirada, California, will be making his inaugural presence for the upcoming Truck season, beginning at Atlanta Motor Speedway in March.
The 18-year-old Smith from Johnston, Iowa, is set to campaign in his first full-time season in the Xfinity Series following a part-time schedule in 2022.
The two-time Daytona 500 champion from Charlotte, North Carolina, led a race-high 362 of 500 laps and snapped a yearlong winless drought with his second consecutive Cup Series victory at Martinsville in the fall.
William Byron and the No. 24 Hendrick Motorsports Chevrolet team showcased a near dominate afternoon at “The Paperclip” to earn their first trip to victory lane of the 2026 NASCAR Cup Series season.