Seems like you would be looking at a radial engined or at least round front airplane. What about a Zero a Hellcat or a Focke Wulf. A big Sea Fury would be sweet too. Those are just the planes that come to mind that I know have plans available in a size that could hide that motor.

For the Allies:

Hellcat
SBD
TBM
SB2C
Skyraider?
Corsair
P-36? blow up Bates plan
I-16
La-5
WW1?

For Axis
Zero
Focke Wulf
Ki-43
Ki-27
Val
Kate