I'm looking at a few options for power for my Humber Jewel. It's 11'6" long with a 6.5' beam. The boat weighs about 450lbs. I am considering a few engines. I was hoping people could weigh in with their 2 cents. The boat came with a 75 hp Johnson Stinger but it's a long shaft and I would have to convert it to a short shaft. Another option would be a 60 hp Evinrude 2 cyl short shaft. How much pop would that motor have? The third player is the classic 50 hp Mercury 4 cyl. What do you guys think.