How to pick a cam

One of the issues with cam selection for those who do it only occasionally, is the sheer number of different profiles available, and far too many, IMO, that are little more than duplicates of one-another. If you are looking through the various catalogue listings do not get confused when brand-x cam has 0.005" more lift or 2 degrees more, or less, duration. In a street car it simply won't make a difference. There are too many other factors involved.
If available, you might look through one of the old Direct Connection engine or race manuals. It is still viable information and may help provide some guidance.