Auto Racing: Can-Am Cartel

Every driver's dream is to build and race his own car. New Zealand's Bruce McLaren, 31, has carried that dream several fancies farther: practically everyone else is driving his cars too. In this year's six-race Canadian-American Challenge Series for Sports-Racing cars, 16 drivers in a field of 40—including McLaren and his countryman Denis Hulme, 32—are piloting sleek, slope-nosed McLaren-built machines. Last month, in the fourth race of the series at Monterey, Calif., McLaren cars swept the first six places, with Hulme finishing second and McLaren fifth. This week, at Riverside, Calif., his cars took four of the first five...