70 Swinger over center clutch spring

I saw some discussions about the over center spring. I do not have one, and my pedal is "VERY" hard to push. I do not know what type of pressure plate I have [just got car in Sept. last year ]
I am not real smart with cars , but I do not understand why a diaphragm pressure plate, is not suppose to have the spring. I would think the pedal stroke would be the same, with or without the over center spring. The clutch seems to disengage without a long push, maybe halfway to floor, but of course...

70 Swinger over center clutch spring
Author: admin