Darin Allen, a world champion given an at-large berth to the U.S. Olympic Boxing Trials after failing to qualify, reached the 165-pound final Wednesday night.

Allen overcame a slow start and scored a 4-1 decision over John Scully, 20, of Windsor, Conn., who had outpointed Allen in the final of the Eastern Olympic Trials in June.It was a big victory for Allen, 23, of Columbus, Ohio, who has had his problems since winning a world title in 1986. In Saturday's final, he will box Anthony Hembrick of Ft. Bragg, N.C., who outpointed William Guthrie of St. Louis 4-1.

Kenneth Gould, 21, a world champion from Rockford, Ill., boxed his way into the 147-pound final with a 5-0 decision over Gerry Payne, 17, of Washington. Gould now will meet Ron Morgan of Cincinnati, a 3-2 winner over Tony Robinson of St. Louis.

Kennedy McKinney got off the canvas in the second round and upset Michael Collins in a 119-pound semfinal.

McKinney's 4-1 decision before 1,025 fans in a ballroom at the Hilton Hotel set up a rematch of the U.S. Amateur Championships final match in which he lost on points to Jemal Hinton.

The 18-year-old Hinton advanced to Saturday's final with a 4-1 decision over Fernando Rodriguez.