But the old Spa punished mechanical components and fuel calculations with equal indifference across its 8.7 miles of public road.
At the end of the penultimate lap of the race, holding a comfortable 30-second lead, Stewart’s car ran out of fuel. He was forced to coast into the pits, dropping to fourth place.
McLaren, who had driven with composure to maintain his position near the front, inherited the lead.
The M7A, powered by a Ford Cosworth DFV engine in only its second season of competition, proved reliable and quick enough.
So sudden was the final-lap drama that McLaren crossed the finish line completely unaware that he had actually won. Pit communication was primitive; he pulled into the paddock believing he had finished second or third, only to be informed by a mechanic that he had taken the chequered flag.
“It was about the nicest thing I’d ever been told,” McLaren said at the time.
The win proved to be the only Formula 1 World Championship victory Bruce McLaren would score for his own team. He was killed testing a Can-Am car at Goodwood in June 1970, just two years later.
Emerson Fittipaldi
1974 Brazilian Grand Prix
Fittipaldi before the skies opened and the race was stopped
Grand Prix Photo
When Emerson Fittipaldi walked away from Lotus to join McLaren for the 1974 season, the move raised eyebrows.
He was already a world champion, confirmed as one of the quickest drivers of his generation, and Lotus, for all its internal friction, had given him a championship-winning car just two years earlier.
McLaren, by contrast, was a powerhouse on the rise, highly competitive but still hunting its first world title.
The Brazilian Grand Prix at Interlagos was the second round of the 1974 season, and winning it carried a significance that went well beyond the championship points.
Interlagos in those years was a 4.9-mile layout unrecognisable from its current configuration, and demanding in ways that suited a driver of Fittipaldi’s technical precision.
Fittipaldi sent the home crowd into hysterics by taking pole ahead of Carlos Reutemann and Niki Lauda.
The race itself was anything but straightforward.
The start was delayed after officials swept the circuit and completed final preparations, and when the field finally got away, Arturo Merzario was hurried into position after last-minute work on his car.