I would look through the catologs of major cam companys and focus on cams with power ranges of 1,000/1500 to 4800/5400 roughly. Then call your cam grinder and get thier opinion as well as what they can do with your stock core. With only 318 cubes and stock compression personally i would shoot for more lift with a moderate increase in duration to keep that 2,000 rpm efficiency for best mileage.
