Busch finished fifth Sunday in his first race since being reinstated by NASCAR after the driver had been suspended and missed the first three races of the season.
Driving the No. 41 Chevrolet for
"Top five [finish], we'll take it," Busch said. "It was a pleasure to drive the car. We started our season today."
Busch was suspended on the eve of the season-opening Daytona 500 last month amid allegations of domestic violence by a former girlfriend. Busch denied the allegations.
After Busch agreed to follow a NASCAR recovery program and authorities chose not to pursue any criminal charges against Busch, he was reinstated.
"Lots of emotions" during the race "but [I] had to keep those in check and focus on the race car," Busch said.
Team co-owner Gene Haas said Busch "appreciates that driving at this level is a privilege."
"Kurt has a much more focused attitude," Haas said. "Now he can get back to business."
Earnhardt was not injured but his race was done. He finished last in the 43-car field.
"The car was really, really loose today and [it] just wore the right rear tire out, and blew the tire," he said. "We just have to get the balance [of the car] better where we don't burn the tire off of it."
Kasey Kahne, an Earnhardt teammate at
"Harvick was the only one better than us the entire race," Kahne said.
As for achieving the milestone in starts, Kahne said: "I hope I get 400 more."