Tom Brengle, left, and his younger brother Dave Brengle, in the 1961 Alfa Romeo Tipo 63 that their mother, Nadeene, raced in the 1960s. The two hunted the car down, bought it and restored it, and this week returned to Mazda Raceway Laguna Seca, 50 years after their mother raced the Alfa there. (Charles Fleming / Los Angeles Times)