It's not really clear what you are asking... do you want fastener descriptions for the parts on the assembly drawing so you can match yours or are you having a hard time interpreting the drawing?
Unfortunately, as you see, the assembly drawing will reference part numbers but you will not find a complete description. For example, I circled a bolt and washer (#19 and #3) along with their PNs. It's hard to read, but I think the bolt is PN 9428480...best guess. The washer is PN 9798965, again a best guess.
What I have done in the past is pull the part numbers off the drawing, then search for them on the AMK web site. They do a fair job referencing original part numbers but between the poor assembly drawing and AMK not covering everything, it's a crap shoot at best. When AMK doesn't cross-reference, check their Pontiac kits. They often substitute with the same size and you can guess based on their description.
And just to illustrate how difficult this can be, AMK doesn't recognize those two PNs... which turns this into a real scavenger hunt.
I think others on PY have old GM Parts catalogs that would describe those two (an all other) parts sufficient for you to figure out which of your bolts matches.
If there are specific questions, maybe post them to narrow the scope a little?
Mike