RESULTS: Practice 1
Burton, three times a pole winner in the NASCAR Camping World Truck Series, posted a lap of 152.056 mph to lead the 1 hour, 15 minute practice.
Blaney checked in at 151.758 mph to take the second spot with Busch (151.592), winner of the series' most recent race at Charlotte Motor Speedway, third.
Darrell Wallace Jr. and Ty Dillon completed the top five.
Series points leader Matt Crafton was 13th overall.
Teams have a second practice on the 1-mile concrete track later Thursday, beginning at 4:15 p.m. ET.
Twenty-eight of 36 teams took part in the session.
The Lucas Oil 200, the sixth of 22 races this year, is scheduled for Friday at 5 p.m. ET.
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