CHARLOTTE — For most of his career, Kurt Busch had a tough-guy persona on and off the racetrack.
But the 47-year-old Busch showed a softer side during his NASCAR Hall of Fame acceptance speech on Friday night as he paused to honor his former Roush Racing teammate Greg Biffle, who died in a plane crash along with his wife, two children and three others on Dec. 18.
“I can’t put the words together, but you and I were like peanut butter and jelly when we raced Cup together,” Busch said, addressing Biffle. “And you were instrumental in helping me win a (Cup) championship…