I have restored a 1979 18' riveted hull and am looking for the best size motor for this boat. I don't plan to run the Kenai so the 50 hp is out. I need this for a cheap ride when I want to do some close in day trips for salmon and shrimp and don't need the luxury of my Glacier craft with its high fuel use. What would you guys power this with? I'm thinking somewhere between the Yamaha 70 and 90 hp. What do you guys think? Also this will need a long shaft because the transom is about 25.5". Thanks for any input.