Use an Airmar dual fequency 50/200 Tilted element through hull.
The tilted element lets you mount it flush with the hull NO fairing.
They come in a few different angels.
20 deg deadrise, that should be what your boat is.
~..~..~.. ><((((º>
Things done at the last possible minute are done with the greatest possible information. Procrastination is, therefore, the most efficient means of doing things.