I would call Pantera and talk to them. I am sure if some one has done it they will know. Instead of a notch I would put on a bracket to get the motors back. That way you have the longer running surface with the ability to keep the motors high. If you are planning on only running a single outboard maybe the strakes would help with top end because you will get more life. If you are going with twins then I doubt you would need to do that.