Speedo Cable: 58-68 era (LHD)This cable SCREWS ONTO THE SPEEDO HEAD.. NOT clip on. This is the standard Speedo cable and casing needed for the LHD early Firebirds & Camaro's and GTO LeMans Chevelle, it is Screw on at the gearbox and SCREW ON at the speedo head.. If you have a large body car like the RHD Camaro or Firebird Chevelle GTO etc.. or a full size Impala or Parisienne, GP Caddy etc.. look up number Cable73SP Latter ones are CLIP on at the speedo head. This is 63 inches