Would n't the cam be a bit tight? if the head was planed too much and it was warped enough to cause that sort of discrepancy the cam won't turn.
Often the valves being remachined will be enough to give different readings like that afterall the valve head takes a lot of combustion chamber volume.
I don't think it's too high ,which is why I'm sticking by the suggestion the Fuel is too blame ,along with the plugs being too hot,again the highish comp.readings can be off set with colder plugs.
Also,has the cam timing been checked accurately?