As said the motor/thrust will be more than enough for this plane, the most important thing is to make sure the COG is correct. Jester was implying that the plane might be quite nose heavy with this large motor.

You can get it all setup to fly, and then just hand toss it into some some tall grass, or similar to see how it glides. If it shoot upward its probably tail heavy, if it quickly nose dives it probably nose heavy. Of course this assumes all control surfaces are setup properly.

Let us know your results.