Hi,
I suggest checking the free play at the cross shaft arm on the bellhousing of the transaxle. (the arm that has cable with the wing nut adjuster passing through it).
If you really have free play here, and the clutch doesn't slip, when you shift or really get on it, then, short of replacing the clutch, that's pretty much how it's going to be.
You mentioned that you replaced the cable. Is the clutch action the same as it was before you replaced it?
You might also want to check the boden tube. Thats the flexible clutch cable tube that goes between the pan and the transmission, it should have quite a bit of bow (or sag)in it. If its straight, then adjust it with the additon of washers on the tranny end of the boden tube. If it stays straight after trying to adjust it (assuming that it was straight before) then you've got problems.
The problem in that case is usually the clutch tube in the pan has broken loose and is moving forward. In that case you need to get the tube re anchored to the pan. Usually a trip to the weld shop and someone that knows what they're doing is the next step.
Back to your description and concern. It doesn't sound to me as though you have a problem. Each clutch assy seems to be a little different. Your setup just tends to release near the top of it's travel.
Greg B