If I remember correctly, that boat comes with an outboard option as well. I don't know how Tracker does it, but some boats that have both options will have a hull and transom that is very similar for both motors, to cut down on production costs. If that is the case, you will need some modifying, but it shan't be too hard. Now, if it isn't you will have lots of designing and fabricating work to do, but it is still doable. Not cost effective, but nevertheless doable. I have seen this very same thing done a few times on other boat restoration boards, and it never is cost effective, and a whole bunch of people will say you can't do it.
Really, I don't think any of us on this board, with the possible exception of Kevin Morin, would be qualified to redesign that transom. And, he would need more pictures of the guts of the boat to figure that one out. Maybe an email to Tracker is in order, but I can almost guarantee they will not want to be involved in something like that.