The one on my sbird measures 20-1/2 from center of ball to center of stud hole. It measures 16-1/2" from the flat that sits against the pedal bracket, to center of stud hole closed, 18-9/16 wide open, limited by pedal bracket. It also appears to have been marked with white paint at the carb end to color code it. Only the forward barrel has the white paint, so may mean nothing. If I recall the cable body is shorter on the 4bbl cable, like 20-1/2 long with a 13-1/4 cable body.