How do I figure out bolt sizes by looking at the shop manuals and assembly book 1962

[tednet]

Hello. I picked up a mostly disassembled 1962 c10 and my biggest headache right now is bolt and screw sizes. I thought getting the assembly manual and shop manuals would help me out, but they don't list bolt sizes, just bolt and a part number for that bolt.

Is there anywhere I can put the bolt part numbers and get back the size? Maybe a website? I read somewhere that there is supposed to be a parts index book that will show the sizes. Anyone know the name and where I can get one?

Thank you all in advance!

EDIT: Found the thread where a parts book is mentioned. https://www.67-72chevytrucks.com/vbo...d.php?t=426211
It's an old thread though. Has there been any developments in the recent years. Anywhere I can find a parts book online? Or can anyone look up some part numbers for me?