I'm confused about the belts. Factory belts were THREE point, lap and shoulder sash. The shoulder belt runs from the quarter pillar and through the loop on the sill, then across your lap. The tunnel side belt meets half way on the lap. Are you going to fit aftermarket inertia reels and only use TWO points, or have I misunderstood...???
Doors were adjusted at the factory with specially shaped shims, as were the inspection flaps and tailgate.
Factory parts list diagrams/schematics and factory service manuals tell you pretty much all you need to know about how to reassemble the door furniture and door glass, as well as how to adjust it all properly. Have you not got any factory literature? I consider it essential reading and reference.
Skimping on the cowl locating tab bushes is a poor decision. They are The Right Part in The Right Location, cost next to nothing all things considered and do the job FAR better than bits of rubber hose. What are you thinking?!
Maybe it's the heat that's making it worse, but you're starting to cut too many corners and your impatience and frustration is palpable. You have a BIG audience at your disposal via all the forums you are posting this vlog to and many of the people watching have done it all before you many times. Why not ask for advice/tips, do and don'ts, component checks and even scans from relevant factory literature BEFORE you embark on each section? When I was watching you messing around with the front brake calipers I almost spit my tea out at the screen in wanting to tell you that you were using 260Z hubs (and 260Z struts) not 240Z type, and that's why you were getting offset issues. A quick peep in the FSM or FPM would show you the difference between the hub types, and explain why the calipers were not fitting. Come on, ask us!
And by the way, don't worry about your seat belts killing you. Your roll hoop will do that first...