It's a 502. I Had Tyler Crockett do some work to it. Brodix heads, CMI exhaust, Holley Fuel Injection intake, different cam, and reprogram the ECU. Dyno'd at 569 HP, so it's problably pretty close to a Merc. 525 .( They usually dyno at 540-565hp)
I've run it for 2 years now with no problems. I have run it hard, many times, in some pretty rough water and feel pretty comfortable with the set up. Figure I'll run it for another year and then maybe have him bump it up a bit more. I can't wait! :biggrinjester: