Thanks for the offer Geof,but I,m not to sure it will work in the 73 Dart Sport with a 4 speed?Hunky do you know if the 70 Duster speedo cable is the same?I,m just not sure if these will work with the 4 speed?I,ll have to do some searching and ask some members for answers.I,ll get back to ya,s either way.Thanks.:clock: