Need 318 help/advice

The problem with the internet is you get all kinds of answers from well meaning people. You don't know which is the right answer for you. When picking a cam, try calling a cam manufacturer, tell them what you want, and as much as you can about your car. I would say you would want somewhere between 260 and 268 duration and less than .500 lift. I would also say that you should tune it as much as possible before you change anything, especially timing.