Cam up my 318, help me chose!

Henrik, there is lots of good info above that I agree with. You really need to decide if and when you will go to the 3.55's, as that makes a huge difference in cam choice with a mild low compression engine like you have. A month or two, I'd say go ahead and cam up now.....but if it's just a "wish list" item that may take a year or two, I'd leave well enough alone for now and just tune the timing and the Holley to get the best out of it that you can.