driver Emerson Fittipaldi to compete in the Thousand Miles of Guanabara endurance race. This flat-eight engine was made by joining two 1.3 L Volkswagen flat-four crankcases with an elastomeric gasket and connecting the two crankshafts together. Several similar Volkswagen-based engines were built for Fittipaldi's racing cars in the early 1970s. Porsche Porsche used flat-eight engines in various racing cars throughout the 1960s. The first Porsche flat-eight was the Type 753. Work began on it in 1960, following the announcement of a displacement limit for the 1961 Formula One season. Designed by Hans Mezger and Hans Honich, the engine includes features shaft-driven double-overhead camshafts, a two-piece magnesium crankcase casting, eight individual finned cylinder barrels, a solid crankshaft running in nine main bearings and Lucas electronic ignition. The version of the Type 753 used for its debut at the 1962 Dutch Formula One Grand Prix produced . At the 1962 French Grand Prix, the Type 753 engine delivered Porsche's only F1 race win as a constructor, in an 804 driven by Dan Gurney. The 753 also influenced the design of the flat-six engine used in the first-generation Porsche 911. A version of the Porsche flat-eight, designated the Type 771, was developed alongside the Type 753. This engine was intended for sports car and endurance racing, and was used in the Porsche 718 W-RS, Porsche 904/8), Porsche 906, Porsche 907, Porsche 909 and Porsche 910 racing cars between 1962 and 1968. A version of the Type 771 enlarged to was designated Type 771/1. In 1968, a new flat-eight engine called the Type 908 was introduced in the Porsche 908, which competed in the Group 6 Prototype-Sports Cars category. The Type 908 was not based on the Type 771, but instead the Type 916 flat-six racing six-cylinder engine with two additional cylinders. Porsche also installed Type 908 engines into two Porsche 914/8 mid-engined road cars. The first of these was a concept study built by the head of the racing department, and the second was built as a 60th birthday present for the company chairman. Although Porsche never produced any road cars with a flat-eight engine, a prototype of such an engine was built in the late 1960s and early 1970s. During this time, Posche had been commissioned by Volkswagen to develop "Project EA266", a replacement for the Volkswagen Beetle. Project EA266 was powered by a water-cooled inline-four engine which was mounted longitudinally under