Have built a 72" solid blue foam A-10 Warthog. It replaces the 80" I backed over with my own car.

Can I mount a single EDF unit in the 6" wide X 8" high area of the COG with the blast angled SLIGHTLY downward at a angle thru a full sized open exhaust hole.
I realize the foward thrust is reduced more & more as the downward angle is increased. I think that more angle would cause the plane to lift straight up also.
Is this the same as a center mounted pylon engine on top of a powered glider?

I assume "C" is best. but are "A & B " livable ?

Thanks