DAYTONA BEACH, Fla. — On Feb. 15, 1948, following a famous meeting at the Streamline Hotel rooftop bar with founder Bill France Sr., NASCAR staged its first official race — the inaugural stock car race on Daytona Beach. But those were modified cars, and races among those cars evolved into what is now known as NASCAR’s Whelen Modified Tour, previously known as the Winston Modified Tour and the Featherlite Modified Series. NASCAR’s “Strictly Stock Series,” which is now known as the Cup Series and synonymous with the highest level of motorsports, completed its first season in 1949. Charlotte Spee…