As folks re-discover the fine early boats the question of an engine swop looms.
To me the hardest part o the swop would seem to be removing the old engine 3000lbs of 8V71 or 5000lbs of 12V71, especially in a boat with out the proper prior construction , a hatch setup so just a crane and hook does the job.
On TV I saw where many motorcycle thieves use a can of nitrogen to freeze metal to cold hardening and simply wacking it with a hammer.
I wonder if a properly prepaired worker could use this system , with a nitrogen truck , and breathing gear to do the same?
All the old parts are heavy so even items like the crank would be easier to stagger up a companionway after disassembly and breaking in pieces..
The new engine would be 1/3 to 1/5 the weight , and just removing the head and would reduce that a bit.
Then a simple skid setup might get it >down the hatch<?