Front air intake for the radiators was standard practice at the time, although the Ferris approach is distinctive. Ferris also adopted a typically Chapman attitude regarding the cockpit regulations, scheming a cockpit enclosure feature that would both reduce drag and improve airflow to the rear wing. (The Ferrari Can-Am design featured a similar approach and was considered acceptable.)

The most distinctive aspect of the design is the very long tail, at a time when such tails became a feature at Le Mans but had yet to appear in Can-Am designs.

Then the brief changed, when Can-Am caught up with the F1 regulations and banned high wings. The actual regulation was something of a grey area – just what Colin Chapman liked – which left room for significant rear aerodynamic devices, as long as they could be considered to be ‘part of the bodywork’. This led to Ferris incorporating a low-level rear wing, much in keeping with the approach adopted by other designers at the time. However, Lotus ultimately did not have the spare resources to pursue the idea and it remained on the drawing board.

Upon rediscovering the Can-Am schemes, I approached Russell Carr, head of design at Lotus Cars who enlisted the volunteer support of Pete Reach and Barney Hatt to assess the schemes and establish if they could extrapolate the information to realise a 3D rendering using the state-of-the-art software at their disposal. Many hours and several review meetings thereafter, the Lotus Cars Design Studios team pronounced themselves satisfied that they had been able to represent the essence of the original Geoff Ferris design.

Back in the day, all works Team Lotus racing cars were presented in Gold Leaf Team Lotus livery, so there is every reason to expect the same would have applied to Type 66. Indeed, perhaps the project was encouraged by the title sponsor considering a move into the USA market, in concert with Lotus Cars’ objectives.

Given that the 1970 Can-Am series featured 10 races it is hard to see how either Jochen Rindt or Emerson Fittipaldi would have entertained the idea of racing the car, even though only the Mexican GP clashed. It is reasonable to think there would have been no shortage of Stateside drivers keen to secure a works Team Lotus drive; alternatively the Type 66 could have been principally a customer car, much like the Type 70, although the 70 proved to be the last customer-focused racing car for the marque.

As is the way with motor racing teams, Team Lotus was always stretched to its very limits; at times even beyond the limits of its mechanics’ endurance. Given the Formula 1, Formula 5000, Formula 2, Formula 3 and Formula Ford activities of Team Lotus and Lotus Components, it would have been an immense effort to take in Can-Am as well. But for Colin Chapman, running a business employing hundreds of people, the commercial imperative was the strongest force; if it had looked like it might work financially then it is likely that Team Lotus would have realised these Geoff Ferris schemes and headed for North America, to join in one of the most spectacular racing categories ever.