Could be the case or the engine builder knew it was going in a boat that was going to be driven hard so he opened the checkbook for all the good stuff. I've seen customers spend $30 to $40K for a street car engine. Doesn't happen often, maybe once a year. Have a 428CJ in the shop right now where the owner is going to spend $40K on the engine just because he wants the best of everything. It probably won't make more than 600 hp when finished but it will last forever.