Just have to remember 318 heads have the small ports so a 360 or 340 intake would be a mismatch on port size, that being said a Eddy performer would be your best bet or a Weiand as one member posted
Have a set of stock 1.88/1.60 valves and springs from a 915 j head looking for the stock retainers and the keepers anyone have a used set before I look for new??