The gap is normal although it depends on how much the gap is as to the condition of the strut mount. My old ones had a gap of about 15-20mm. With the car jacked up though, this gap disapeared, although the strut could be moved up and down with ease, indicating the mounts were shot. The new ones have a gap of 5mm or slightly less.
I have heard that G60 mounts are better, (last longer) although they are a different part number, they still fit. (Needs verification!)