Just realized you will also need the rod that the pedal pivots on.
On the four speed setup the clutch pedal includes the rod that slips through the support. You need the rod without a pedal attached. Not sure what the correct term is for this part but I think you know what I mean.
Very nice Chevelle you have there, reminds me of many years ago when I had a blue with black vinyl top Malibu SS, blue interior, knee knocker tach, buckets console the works.........and when I bought it for 1,350 bucks thinking it was a 396, it turned out to have a real L88.....