not sure that they deal with nitro's, but there is a company called Hydro-tec that builds jack plates and they may have more insight on proper fitment for the size boat you have. worth a try at least.
Anyone install an Ultrex on their Z9? heard the footpedal will not fit in the tray??? I have a 2014 Z9 and want to upgrade but want to see how others are installing it if it does not fit!