I am considering 3 planes for a TT .91 FS engine and can't make up my mind the planes are.

VMAR RV-4, should be hot, maybe too hot?
Modeltech P-47, should be near pattern plane performance, comes with retracts!
VMAR Tomahawk II, I got my private ticket on the Tomahawk I and would love to have this model, but was looking for something less docile before running across this.

Not sure the engine will fit under the cowl of the VMAR planes. The RV-4 is out now is there room for it to fit? I could use some .60 engines I guess, but a 4 Stroke would sound more real.