Im building a 46% P51 r/c airplane. The 2 cyl 25/30 omc powerhead fits under the cowling nicely. I also have a 25 merc powerhead that fits also. My thoughts are i can get even more power from the omc being able to cut the head a little. Or does the little merc have more available potential just by its porting alone V/S the omc being an old crossflow design. But airplanes need torque to turn propellors and I feel the omc is more torquey just by seat of the pants driving them on boats. So what are you guys thoughts? Thx, Jeff