74 Duster 4 speed adjustments

IMO, I'd suspect the engine mounts for the driver side lift if you've done nothing with the bell side ball mount. Maybe a little repositioning the engine can help. Possibly a little lift on the passengers side will allow the driver side to roll down.
Ideally your looking for straight across in any view for the bell crank I believe. I like the bell side slightly lower myself.
Check to make sure, by hand pushing reward on the fork, that your release bearing contacts all three fingers at the same time. Just one of them off can eat up the disengagement clearance. The 0.060" plate departure is a starting point to adjust from. Try not to over adjust the 0.060" or you risk the finger backsides clipping the disc springs.
With the clutch engaged and pedal up the release bearing only needs to be off the fingers enough to clear any finger contact.