Has anyone heard of any performance options for a 3.0 merc 140 horse? My boat is a 18 ft Sea Ray and it runs WOT at 44-4600 and it does 38-40 which is plenty enough for skiing ect. My problem is I need that extra bit of UMMMMPH for getting across the lake fast or for pulling my larger sized bro on law without boggin down. I have read about guys who build outrageous stockcar engines using 3.0 parts and apparently make like 250 hp. I don't want to go that far but maybe 50-75 more ponies. Any advise or URL would help. I have 14 years experience working on cars so technical style answers are ok.