cars prototype sports ferrari 1970 front 24h france hi le mans pits res fighting track 1000km italy light monza two a4 brian engineers germany ickx jacky nuerburgring peter porsche redman schetty 1969 1971 1972 a3 amon andretti austria belgium chris francorchamps jo john jump many mario matra mechanics pedro rodriguez siffert simca spa surtees zeltweg a1 alfa arturo attwood beltoise blur cevert elford francois gerhard interview jean journalists merzario mitter night pierre pitstop press rain reflection richard romeo schuetz speed three timekeeping tyres udo vic