I have a '63 Mark Twain with 75 hp Johnson. I am looking into buying an '85 Evinrude 150 hp (that is the max hp on the plate of this boat). Can I put this motor on myself or will I need to get it done by a proffesional? The motor has all the linkage on it. So, I think I can manage to get it all hooked up myself. Perhaps you more seassoned boaters can advise me on this task. If I were to have it put on by a pro, does anyone know approximately how much it will cost.