Just swapped in a good running 340 with a 4speed into a 65 dart. Initally had trouble because when the clutch pedal was pressed made a really loud sound . Changed the clutch , it was used anyways ( I was trying to be cheap) and now when i pressed the pedal in without the motor runnig I hear a clunk. I get underneath have my daughter press the pedal down and the flyheel moved towards the engine when the clutch is depressed. So I am guessing the motor has a bad thrust bearing?