I have two Scorpion 377 engines which are actually 6.2L. I have about 110 hours on each so far and I'm very happy with them. They are rated 350HP at the prop. I'm turning 25 pitch lab finished Mirage +'s on a 28ft Donzi ZX. Speedometer shows 80Mph at about 5000 rpm's. The boat weighs approx 6500lbs.