Case 580B Clutch at top

I have a mid to upper 70's Case 580B with the dry clutch system. I had a new clutch put in it a few years back and I don't use it a lot. In the past few times using it I noticed that the clutch is right at the top of the peddle. It still seems to engage properly with no noticeable slipping.
Is there a way to adjust the clutch to give more peddle ?
I am concerned that it may not be completely engaging.. any help would be greatly appreciated.