351 Ford performance specifications?

[E4ODnut]

Hi All,
I'm in the process of buying a 1993 3288 Bayliner with factory equipped 351 Fords. I've been trying , without success , to get more details on these engines, as, sooner or later, I will want to fine tune the propellers.
I've "Google searched" for several hours, but come up with nothing significant. One source suggested that they were "Blue Water Marine" conversions, but I came up blank on this one. If it's of any help, they are coupled to Hurth transmissions, and are painted a dark Blue/Grey colour, similar to the US Marine Hinos.
Looks to me like they have a 4160 Holley carburator.
I'd like to have the torque, horsepower, and fuel consumption curves. Using this, with the the hull dimensions and displacement, I should be able to get a reasonable starting point to fine tune the props to my particular boating style.
Any assistance would be most appreciated.
Thanks,
Robert Hiebert