There has always been a connection with Ford. After all, the basis is the Kent-engine. Ford is also behind the standard-tuning of the Cortina. In 1962, Walter Hayes started as the public relations manager. Through him, the relationship to Cosworth became more professional. It resulted in the commissioning of the £ 100.000 order, to develop, nothing less than a 3-liter Formula 1 engine. A DOHC four-valve, 1600 cc four cylinder (from the Formula 2) was chosen as the 'practice object'.

To explain the abbreviations, the four-valve was given the description Four Valves Series A, and the actually developed V-8, was called the Double Four Valves (see above picture). However, don't imagine for a minute, that the births of these engines, were in any way simple. Alone the FVA brought the constructor, Keith Duckworth to the borders of despair. It was all about the mixture influx, and the exhaust gas removal, the extremely complicated question of e.g., which angle the valves should have to each other and how the ports should be laid out. Of course, there was also the combustion chamber design to be considered.

Basically, Duckworth left the beaten path, he chose a relatively small angle of less than 40° and the matching, slightly upwards rounded pistons, that was the end of the hemispherical combustion chamber. Thereby, it could be seen, that his ports came out slanting slightly upwards, he considered the smallest possible kink in the input- and exhaust port to and from the combustion chamber, to be important. The two camshafts were, conform with racing engines, gear-wheel driven. Despite the difficulties, less than nine months were needed from the beginning of construction till the first test-run.

Just to catch up, in the meantime, two years after the first move, the company relocated to their own building in Northhampton, about 100 km north of London. One year earlier, Mike Costin was finally available, he replaced Keith Duckworth in the company during the difficult construction period. He had his drawing board at home, which doesn't mean, that each and every detail of his construction wasn't continuously discussed by the four most important men in the company.