Clutch pedal mods
If you can find the earlier pedal assembly the 6 inch dimension is already there, plus the clutch pedal shaft rides in needle bearings instead of nylon as an added bonus.. Herb McCandless never modified the z bar back in the day, said it made the clutch a bear to push, lengthened the clutch rod attaching point on the pedal 3/4 inch instead, probably due to the stiff racing clutches they used to run. A modified z bar may not be as bad with a diaphram clutch.