Check the links section for the Cougar Club of America (CCOA) link. There's some pretty good info there. TCCN (The Classic Cougar Network) seems like they have some great info, but they are not taking new members right now (I'm not a member, but I can't wait until they start taking members again - hopefully!).
Otherwise, there's a lot of folks on this forum that know a LOT about classic Cougars, I recommend just posting your questions here or doing some searches on your topic (there's a search box on the front page of the forum).