Adjust clutch freeplay
There is only one actual adjustment........the push rod down at the bell to the fork. But there's "more" to this.........the type of clutch, or damage and wear to the clutch pp and disc.
There's wear in the bushings and parts, there's bending damage to the parts, and there's fracture damage to the Z bar which happens. The tube can crack and "lose travel."
As old as all these girls are, you could have a mismatch of parts. There seems to be a difference in throw in the linkage used on 340 vs slant six cars. I think "Oldmanmopar" documented this, someone on here documented how to mod the short throw setup to imitate the long throw one.
I used to adjust so it released 'about where I want it' off the floor and make sure it releases CLEAN. But "what this" might leave you with, is a pedal that won't quite return to the top, on it's own. Sometimes, adding a "pull back" spring underneath helps. You hook this to the CLUTCH FORK to keep everything in tension, and run it forward so it "pulls" on the linkage. This will often "pop" the pedal that extra little bit to the top