Kurt Ahrens Jr.
He co-drove the pole-setting Porsche 917 "long tail" at the 1969 24 Hours of Le Mans and the 1970 24 Hours of Le Mans , but neither car finished . 
<triplet> 1969 24 Hours of Le Mans <subj> 1969 <obj> point in time <triplet> 1970 24 Hours of Le Mans <subj> 1970 <obj> point in time