1967 Camaro assembly line photo
 

...

There's a bunch of assembly pics in the John's Assembly Process article, with explanations.
https://www.camaros.org/assemblyprocess.shtml

Question
 

wonder what changed from 1st and second pic. The papers now attached to the windshield and front bumper? Build sheets, broadcast sheet?

Yes - those are build/broadcast sheets. And Hood installed.

K

I would Assume at this point "Chevrolet Side"
"Chassis Broadcast Sheet" since this would contain the two letter codes for Chevrolet assembled components for install.

Also here is a commonly available repop of the GMAD VN/LOS Label on the windshield. I am not sure How accurate my commercial copy is but it is a neat display item

The picture right before those is the front clip being installed.

The sheen difference firewall to heater blower box really stands out on this pic…..

Good pick-up on that!

The upper left one is not in same position.
Possibly different car but same color- model???

Adding
cart looks different.
Maybe car behind in first pic??

All those pictures are of different cars, fwiw.