Watched 88 give it away. Blocking means slowing in the corners. Let the car sit down, don't keep it on the edge of getting loose. Use your mirrors more than the gas when he's on you in the corners, keeps him from bump'n'runs cause he can't get you loose. He can't drive through you, he has to get next to you to pass and win. Slow a little, a fraction, force him to stay back like hes a frustrated tailgator. Block him. Hell, lead a parade lap to the checkers if you have to, just stay square in front of him and YOU decide HIS speed.