[2] The United States Automobile Club had decided in the spring of 1969 that turbines and four-wheel drive would be banned in the USAC racing series.

Andy Granatelli, Chief Executive Officer of STP and the racing team owner, had arranged the deal.

The biggest difference, apart from adding front and rear wings, was the engine.

Since this overheating also occurred in the two factory cars, the vehicles were withdrawn, despite setting fast practice times.

Almost forty years after their construction, a restored Lotus 64 appeared at the Goodwood Festival of Speed in 2008.