Ok, so I have a stealership trying to tell me a boat I am looking at has a 2005 Mercruiser 4.3 Thunderbolt V with 210hp. Does such a beast exist? My understanding is by that year there were the 190hp carb, 220hp MPI from the factory and that the 2-barrel 190hp carb can be tuned up aftermarket to 210-220. Is this guy full of it or am I missing something?