Engine vibration at 60mph and over

[Bullygirldan]

Looking for some advice as my mechanic is unable to diagnose the problem with my car.  I have a 2010 ford Zetec 1.8 petrol manual.  When I get to 60mph or faster I get a vibration from the acceleration pedal and the car does rev and sound slightly louder.  My clutch also happens to be extremely high and I can move my car my using the clutch only so not sure if this is connected.  My mechanic originally thought it was an inlet manifold however he wasn't completely sure and further advice suggests this is unlikely.  Any help and advice welcome. Thanks 

[Micro]

Just check everything in the engine bay is tight and secure. The accelerator pedal is not physically connected to the engine in these models (fly by wire), so any vibrations felt in it are from the car itself.

There is a big engine mount to the drivers side of the engine, if it looks greasy or oily, and has free play, it may need replacing. There are two other mounts iirc that are just rubber so may have perished - your mechanic should know where these are.