Clutch question, Diaphragm versus Borg and beck, who has swapped to a diaphragm and do you like it

I ran a diaphragm pressure plate on my Duster when I had an 833 in it, the pedal effort wasn't bad and I was daily driving it with that set up. But I don't have a direct comparison to a B&B style pressure plate in an A-body. I run one now with my T56 but it's a hydraulic clutch set up so pedal effort isn't an issue.

You absolutely need to remove the over center spring with a diaphragm style pressure plate.

Not sure about your knee, but a hydraulic clutch set up might also be something for you to consider, as you can dramatically reduce the pedal effort.