Hello, I have an 1965 AlumaCraft Bel Mara with a '65 Johnson Sea Horse 60hp. It still has the original pulley cable steering system. The cable drum is worn and has a lot of slop to it. My question is how hard is it to change to a rotary cable system and what all is involved in it? Also, about how much would the change cost? Can a new cable drum be found if I wanted to just stay with the pulley system? Would anyone have a used drum that is in good working condition that they would want to sell? Thanks