Grand American was a NASCAR sanctioned series of pony car . The series ran from 1968 until 1971. The series was called "Grand Touring" from 1968 to 1969. It was sometimes nicknamed the Baby Grand series.
The series formed in 1968 under the name "Grand Touring" as a competitor to USAC's and SCCA's Trans-Am Series. It held 19 events in 1968 and 35 events in 1969. It was renamed Grand American for the 1970 season, hosting 27 events. By the 1971 season, NASCAR saw a decline in sponsorship, fan attendance and participation by teams, with Grand American hosting only 7 events and NASCAR occasionally inviting Grand American cars to Grand National events that were short on entries (after the embarrassment of only 14 cars entering Grand National's 1971 Space City 300).
In 1972, the structure of NASCAR was completely changed. Winston took title sponsorship for the Grand National Series which was renamed the Winston Cup Series. The extensive Winston Cup 48-race schedule of previous seasons was reduced to 31 by having all races at tracks under a 1/2 mile in length or 250 miles in event length moved to a new division called the Grand National East Division. Grand American and retired (as old as 1969) Grand National/Winston Cup cars were allowed to race in the new division. That series lasted from 1972 until 1973. The Grand American series held four events in 1972, its final season.
The series featured Ford Mustangs, Chevrolet Camaros, AMC Javelins, Mercury Cougars, and Pontiac Trans Ams. Several Grand American cars were former SCCA Trans-Am cars, extensively modified to meet the NASCAR safety rules and weight limits.
The motors were initially restricted to a 305 cubic inch (5.0 liter) engine displacement. The 305 cubic inch limit eventually was increased to 366 cubic inch to help with performance and reliability of the Grand American cars.