"Lotus 49 Cosworth"
That's the Lotus 49 powered by the Ford/Cosworth 3.0L naturally aspirated DFV, or "Double Four Valve". The DFV was made by essentially mating two 4 cylinder engines at the crankcase.
The DFV debuted in the Lotus 49 in 1967 at the Dutch Grand Prix at Zandvoort. Jimmy Clark won the race with it, as well as three others Grands Prix that season. It put out about 400 bhp, not gross hp like US cars were rated in at the time. Mighty 3.0L.
The Lotus 49 was notable for making the engine part of the chassis, and the DFV was notable for winning 155 out of 262 races between '67 and '85: 59% of the races it was entered in.
Clark, almost certainly Monza, 1967:
Hill 1967, I don't know what track:
Clark airborne at the Flugplatz, Nurburgring 1967. This was not uncommon. The cars didn't have seatbelts:
