Just a few notes.
You'll be lucky if you burn less than 2 gallons per mile. But let's say you only burn 1.5 (like I did in my 1966 36' Pacemaker). Using the rule
of thirds, you'll have a usable range of about 89 miles. In that trip, I bet there are places where fuel
stops are much farther apart than that.
With diesels, you might get 1.5 mpg. That's a 200 mile range. Still not nearly enough to make me comfortable.
refit would be many thousands. That's Many. Gotta include transmissions, etc. New props (because the diesels will turn lower RPMs). Even if you found the engines for free, it wouldn't be cheap
If you have never owned a wooden boat, let me tell you from experience, they take a huge amount of work. (I finally sold mine for $1. And the engines, generator
and systems all worked.)
Having said all that, there is nothing like the ride of a big wood boat. And the interiors were beautiful.
I'm not saying you couldn't do it in that boat. I'm just saying you have a lot of challenges down that path. You'd certainly get a lot of attention along the way, though.