Before there was the nutty-as-a-fruitcake FIA Group B racing, there was the only-slightly-daft FIA Group 5. Group 5 is the series that saw the 1500 hp Porsche 917 in 1970 and ’71 and the Porsche 935 later in the decade. The Group 5 formula changed significantly over the decade, as demonstrated by the two vastly […]