I run a 175, and I assume it has the same narrow gunnels. In the back, I mounted 3 foot rails. I attached a couple pictures that show at least some of the rails. In the front, I used RAM flush mount bases. Drilled a hole with a hole saw just big enough for the section the holder fits in and then screwed it in with stainless screws. Fits perfectly. I don’t have any pictures of those though. I also installed one flush mount base on the plate where the side and transom come together. You can see it in one of the pictures. I had a hole from a GPS puck there that I needed to cover.