While the Wellcraft seems a bit abused and tattered, to me in a vacuum/if they were all perfect, it would have been my choice. As to the engine size, it weighs somewhere around 300lbs more than my boat with a 4.3 in it if I'm reading the chart correctly and I bet it also has a large gas tank. It's going to be right on the very edge of providing satisfying performance I feel especially when you load it up with people. I get 51.2mph on GPS with a cheap $100 21 pitch prop but as soon as I load it up with fuel, gear and a bunch of people, that speed becomes 44ish on GPS. That boat and my boat should have had the much higher HP v8 options. On the up side, as I approached 40 and am now on a larger lake, I almost never go WOT so top speed isn't as appealing as it was even 5 years ago.