New lightened steel flywheels these days seem to have no clearence for the primary gear so when you install the flywheel onto the crank it binds or jams the primary gear up and causes the clutch to not disingauge. You need to remove the flywheel and in a lathe machine some clearence into the inside centre. I know your flywheel is not a new one but it may be a good idea to check this.
Also if the thrust bearing carrier is worn excessivly then the new cluch arm will need to move much further before the clutch will disengage. Easy fix, just purchase a new carrier or fit a spacer between the thrust bearing and the carrier. (a sump plug washer works well)
The 3rd problem i have seen is that often the push rod for the master cylinder is the incorrect length. The tin tank & plastic tank cylinders have different length rods and if mixed up you can loose clutch travel. Often removing the spacer under the master cylinder base (if fitted) can fix the problem.
Or you could just bend the clutch arm
(ducks for cover)
