The OC spring is out. This unit had the side brace and needle bearings. I will see if I can get a reasonably accurate measurement under the dash, but apparently the side brace (red spring) signals the longer throw?
I painted the springs red and blue for reference. They were not painted on these sets . But the side brace would usually identify the 6 inch style.
I have seen the pedal being depressed all the way causing the pressure plate fingers to hit the clutch plate springs and then fingers to drive the clutch disc. If you have a diaphragm clutch you must remove the large over center spring. This spring will hold the pedal down at RPM's due to the diaphragm pressure plate not having the centrifugal weights for release.
If I were you I would call Dan at Brewers. You may have a synchronizer issue. He sells an upgraded set and they work great. I installed a set in a Barracuda they stop the gear instantly for a smooth engagement.