GM did in fact have Assembly Manuals exactly like that in the 60's and probably well into the 70's, They were for Fisher Body and showed all the assembly steps of pretty much everything that Fisher was responsible for including any accessory add on's. Each page featured part numbers of items, any locations that require lubricant as well as type of lubricant and torque specifications. I have them for my Corvairs and they had come in very handy over the years when putting things back the way they are supposed to be. I have been on a look out for the same manual for my 78 Malibu. I am sure I will eventually find one.