My late father-in-law had an Ocean Alexander 50 mk1 that I ran.
Mystery metal stainless, wiring looked like an explosion in a noodle factory, and she probably had iron tanks, but man, what a great sea boat. Heavy full displacement hull, built like a tank. Nothing like a modern OA.
Along the way I rewired most of her and replaced much of the stainless, but the joiner work was amazing, and with 6-71Ns she burned 9 gal/hr at 9 knots. With 2,000 gallons on board she had some serious legs, we brought her home from Seattle on one load of fuel.
The boat he had before that one was an Aleutian 50 ketch with a Ford Lehman. That engine never missed a beat or had a problem of any kind, and she ran many thousands of hours.