need to learn about camshafts....

If you really want to learn about cams more that just make a selection you could pick up a copy of this book. It's a bit old the the basics are the same ..... Basic Cams, Valves & Exhaust
[ame="http://www.amazon.com/Cams-Valves-Exhaust-Systems-Series/dp/0822760002/ref=sr_1_6?s=books&ie=UTF8&qid=1338554748&sr=1-6"]Amazon.com: Cams, Valves, Exhaust Systems (Hot Rod Shop Series): Books[/ame]