You could see increased lift and duration to a lesser level in the boat (not an ez task at race site). You need to remove cam after noting how it was timed and put it in a cam doctor to really see it's profile. Things like stiffer pushrods increased cam tunnel diameter can allow you to move the HP peak higher up in the RPM range. The crane cam also most likely is not at the highest tolerances so a CNC cut cam would be more consistent.

Steve