I crew on a 365 ketch 3-4 times a year in off-shore races. It's a great boat (though I personally prefer faster sloops). I'd have a hard time seeing any reason it wouldn't be able to cross oceans.
I've also off-shore raced on a Pacific Seacraft 37, which is now on a circumnavigation and doing just fine. That too was a solid boat. But they've done a good amount of work on it as they've gone (which is pretty common apparently on any boat from what I've seen).
As long as it's in good shape, I think just about any boat can cross oceans (even a Hunter). It's more the sailor than the boat.
There's tons of info on here - as well as many, many salts that will talk you through just about anything.
While you're waiting for some responses you can start poking around in this thread: The Salt's Corner Table
It's a thread with some of the best info to some of the most asked questions around here - including yours. And you can see who some of the go-to guys are.