High Quality Content by WIKIPEDIA articles! The 1963 World Sportscar Championship season was the 11th season of FIA World Sportscar Championship motor racing. It featured the 1963 International Championship for GT Manufacturers, which was contested in three engine capacity divisions and the 1963 International Trophy for GT Prototypes, which was contested in two engine capacity divisions. The season ran from February 17, 1963 to September 14, 1963 over 22 events.