This link has just about all the reference information you need to start with. You can spend an hour or two here easily.
http://www.442.com/oldsfaq/oldsfaq.htm
After that, joining an Olds forum is the best bet, and I think Classic Oldsmobile is very good:
http://classicoldsmobile.com/forums/index.php
Realoldspower.com is ok, but it's completely unmoderated. You won't be able to sign up as no one responds to e-mails (I've known at least 6 people that never received replies and could not join this site over the past year). Vulgar language, nudity, it's there in all the threads, so surf this site at your own risk. Lots of good info if you can get past the junk, and some knowledgeable people.
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1959-1980 Pontiac Window Sticker Reproductions : http://www.pontiacwindowstickers.com
My Bio: I am currently writing articles for POCI's Smoke Signals magazine and enjoy promoting and discussing the history of the Pontiac Motor Division.