Former KGO 810 show host Bernie Ward, who pleaded not guilty in December to distributing and receiving child pornography via the Internet, plans to change his plea Thursday, federal court records show. Ward, 57, is scheduled to appear before U.S. District Judge Vaughn Walker in San Francisco to change his plea. He is a month away from going on trial. The Chronicle, which first reported the change in plea, said it could not reach Ward’s attorney, Doron Weinberg, for comment last night.