assembly manuals with bolt types

[LS-300]

I currently have the Challenger & Barracuda Restoration Guide. Where it is very informative it lacks on what bolts were used where. This may not seem like a big deal unless you have the parts without hardware. It would be nice when looking for replacement hardware what size, length, dia & threads are needed. Anybody know where I might find this information?
The car in question is a 68 Barracuda Coupe.

 

[LS-300]

I see a fair number of people looking but does anyone have a good answer? I hate spending money on stuff to be set aside!