I installed
the rudder sensor in my V32, very similar to the space you have. I used a block of 1/2" Starboard to raise the arm to the proper height. I made a mounting bracket for the rudder post from a galvanized electrical box cover. Remember to keep all of your angles as square as possible or in a parallelogram, so that your sensor reads correctly as the rudder moves. I don't have pictures, but if you need them I can easily take some for you. Just think everything through as you set it up.