Re: question... repowering my boat...
I disagree. The years I spent as a "sixpack" Charter Captain, and as a consultant to OMC reinforce my opinion that The engineers at Grady White knew exactly what they were doing when they rated that boat for maximum safe HP.
A skilled helmsman can probably avoid disaster with an overpowered boat, even a Grady White or a Boston Whaler, but for the typical boatsman massively overpowered is dangerous, even life threatening.
iboats advocates safe practices, including respecting Max power ratings.