318 poly wide block

This is WRONG. When disk wears the pedal goes UP, and the release is closer to the TOP of the pedal travel. FORGET clutch for the moment. Try and discover why it is not releasing as you have been

I had to edit my previous post, I don't like getting too aggressive on these forums(it just isn't worth it).Here is my edited post:
I may be incorrect, but I know this, that transmission will end up coming out before that truck is fixed. here are the possible reasons: That clutch linkage doesn't have enough travel, the release bearing may not be moving, the pressure plate may be broken, or the clutch is shot. It is down to that you can see it in the video. Checking the linkage and adjusting the pedal freeplay is all they can do without pulling the trans and inspecting those internal parts.