1972 Canadian H-Code 340 Dart Swinger Special Resto - Finally started!

Yes, correct. With a diaphragm clutch the over center spring can, in some cases, be strong enough that it prevents the pedal from returning up from the floor. Diaphragm clutches require much less pedal effort.

I have removed the spring before and replaced it with a much lighter one to pull the pedal all the way up so there is no weight or force on the throw out bearing when the clutch pedal is released. I used a jack hold down spring from the trunk of a parts car to replace it.