BOSTON — Chad Venning scored 15 of his 17 points in the first half, Fred Payne finished with 15 and Boston College rallied to beat Miami 78-68 on Wednesday in the Hurricanes’ first game since Jim Larrañaga stepped down as the men’s basketball coach. The 75-year-old Larrañaga was replaced for the remainder of the season by associate head coach Bill Courtney — one of Larrañaga’s best friends for the past three decades or so. Boston College trailed by as many as 19 points in the first half.