Dart Clutch Adjustment Problem

had the same issue in a 69 dart, the problem was the pressure plate. A used pressure plate can be deceiving because it might seem ok but often they are aged and weak. The pressure plate is the main spring for the whole set up.

I would say your best bet is a new clutch/pressure plate/ throw-out bearing set. Solved the problem here and a new set is $130.- $150. and will solve the problem for years of normal driving.

I get the whole idea of using used parts to save but in this case clutch parts are not always a good thing to re-use IMO.

Best of luck