How many miles on this truck?
The link posted shows a "regular pressure plate" in the picture and there is no mention of self adjusting pressure plate in the specs.
Regular pressure plates were/are used on clutch systems that have External adjustments, Hydraulic or mechanical.
There would be a "fork" with the throwout bearing inside bell housing and then it's end would stick out the side of the bell housing, this end would have an adjustable rod to set engage/disengage point for clutch/pedal, and you would adjust it as the clutch disc wore down.
When slave cylinders were moved inside the bell housing there could be no "adjustment"
So self-adjusting pressure plates were invented/used.
These have a set of springs around the center, as the clutch disc wears down the springs push the pressure plate closer to the flywheel, self-adjusting, so engage/disengage should stay at the same place on the clutch pedal.
You can use regular pressure plate with internal slave, but you do get what you have now, pedal must be down to the floor PLUS an inch, lol, to get disc to disengage fully.
Right now with pedal to the floor the disc is still dragging a bit on the flywheel so input shaft of transmission is still spinning, while moving the output shaft is also spinning so meshing the gears is not a big deal, but when stopped the output shaft is not spinning so you must "force" the input shaft to stop spinning as well, this means you have to push harder on stick(forces syncro to stop input shaft) or shift into 3 or 4th then back to 1st to get input shaft to stop spinning, reverse does have syncro but it will also grind if input shaft is still spinning.
Best bet at this point is to see if master has some air in it and get it out, and then bleed system again.
As said, the clutch disc is rubbing on flywheel so it will wear down enough in a few weeks.
Picture here of self-adjusting and regular pressure plates side by side: http://www.370z.com/MagazineArticles...-Flywheel.aspx
2nd picture down self-adjusting on the left, look for the springs.