Complex sentence: Nor was the Mulsanne Straight at night a place for the inaccurate or nervous--and he scored his most notable success at Le Mans, in Aston Martin's DBR1/300 in 1959.
Split into simpler sentences: Nor was the Mulsanne Straight at night a place for the careless or nervous. Nevertheless, he scored his most notable success at Le Mans, in Aston Martin's DBR1/300 in 1959.