There seems to be a lot of myths being passed around regarding EASA. For private operations EASA are currently only responsible for certification issues. Maintenance stays with the CAA until 2007/2008, when EASA Part M comes in. Even than there will be few changes to the actual maintenance requirements.
With the exception of changes the AWN 75 (Prop inspections) there have been no changes to maintenance requirements because of EASA. There is no extra work or overhauls to do because of EASA.
Stuart
If your engine meets the requirements of AWN 35 (Piston engine O/H lifes), which I think it does based on the information supplied, there is no reason why it should not go G-