Busch, a three-time winner at Bristol on the truck tour, set the pace in final practice by clocking the 82nd of his 83 laps run with a speed of 124.178 mph in the No. 51 Toyota. Wallace, his Kyle Busch Motorsports teammate in the No. 54 Tundra, was the fastest in the opening 50-minute session on the .533-mile concrete track at 124.387 mph.
Busch's speed in the 90-minute final practice edged German Quiroga Jr.'s 123.921 mph lap in the No. 77 Red Horse Racing Toyota. Ty Dillon, series points leader Matt Crafton and Ryan Blaney completed the top five in the second session in preparation for Wednesday night's UNOH 200 (8 p.m. ET, FOX Sports 1).
In the first practice, Chase Elliott was second-fastest at 124.114 mph in the No. 94 Hendrick Motorsports Chevrolet. Defending series champion James Buescher, defending race winner Timothy Peters and Quiroga filled out the remainder of the top five.
Ben Kennedy, great-grandson of NASCAR founder Bill France Sr., was 23rd-fastest in the first practice and 20th-fastest in the final practice in preparation for his Camping World Truck Series debut.
Keystone Light Pole Qualifying (two laps) is scheduled Wednesday for 4:35 p.m. ET.
FULL SERIES COVERAGE