At March Engineering in Bicester, designer Robin Herd had watched the P34 experiment closely and, by late 1976, had come to the conclusion that the 'four front wheels' concept might have been a blind alley.
In his assessment, the improved aerodynamics at the front were largely negated by the rear tyres which at 24" (60 cm) diameter would still have accounted for 30 to 40% of the car's total drag.
With the apparent technical advantages of this concept laid out, Max Mosley (Herd's partner at March Cars) gave the go-ahead for a prototype to be built.
Mosley noted that the P34 had generated a lot of additional publicity for Tyrrell and, aside from the technical merits, believed a March six-wheeler would be an attractive package to present to potential sponsors.
Unfortunately, the March team was at something of a low point financially during 1976/77 and the development costs of an all-new six-wheel car would be high.
As a compromise measure, a 1976-design Cosworth DFV-powered March 761 was adapted by team mechanic Wayne Eckersley in a quiet corner of the Bicester factory.
Herd's original design for the gearbox casing recognised these factors and specified a series of strengthening ribs to counteract the additional loading.
Simultaneously, the company also outlined plans for a full running demonstration and developmental testing at Silverstone circuit scheduled for a fortnight later.
The photograph in question actually showed the car testing at Silverstone in February 1977 and it is clear from contemporary reports of the Grand Prix that the 2-4-0 was not present.
The fact that the 2-4-0 was originally an inexpensive workshop conversion of the standard March F1 chassis meant that Lane was easily able to fit the unit to his car.
Taking advantage of four-wheel traction, Lane won several British hill-climbing events in the 771/2-4-0 that year with the first win at Wiscombe Park in May.
However, any hopes of seeing a 2-4-0–style race car compete in a grand prix were dashed when the FIA banned all four-wheel drive systems in this category.
Additionally, significant income was generated for the team when the Scalextric company purchased the rights to produce and market a best-selling 1/32 scale slot-racing replica.