Would NOT follow the assembly manuals if your going to take the diagrams as a representation of what the workers did on the factory line. If you do you will be wasting your time IMHO since it misses so many details - one being the fading at the rear crossmember or dolly marks for example.
Another example would be the front wheel well drawing shows paint and sound deadener applied out to all edges.
Had a few people who followed the assembly manuals exactly that we've seen at shows and the car didn't represent how the cars looked or were build and did pretty poorly given how much effort they likely put into the car
There are other details where the Assembly Manual reprints are useful especially if you back them up with original car examples from your same plant and production period since there were allot of running changes and the manuals do not show or represent many of them