Complex sentence: The T603s took part in 79 races (24 international) in years 1957 to 1967, resulting in a total 60 first, 56 second and 49 third positions.
Split into simpler sentences: The T603s took part in 79 races (24 international) in years 1957 to 1967. They gained altogether 60 first, 56 second and 49 third positions.