What valve sizes do FC as Fs use in their head packages? I know that FRPP uses oversize valves, but does anyone have good luck with stock size valves? I want to port my head, as I have done a few, but because of my other loves (Mustang and Lightning), the Focus is my budget car so I would like to keep the stock valves to save a little money. I know that Esslinger does this on most of their head packages and has good luck, but what about everyone else? Also, what is the word on the revised Crower stage II cams?