Hey you aerodynamics enginners:

Building an A-10 with twin .25FX engines that sit about 3 inches high off the trailing edge of the wing. If I were to make the engine platforms longer or were to raise them so that they have, oh about 4 to 6 inches clearance will I significantly change the thrustline or CG?

This is because you can't find props that are pitched enough but short enough to fly the plane.

Any help is appreciated.

Sina