Basically the same engine, although the head will not have the water pump holes drilled into it. Most were raw water cooled, so the if it was run in salt water, the head and block are toast.
However, most of them had steel timing gears, and those alone are worth getting out of it. They never, ever, wear out.
The fuel pump may have a priming lever on it, and will be a high capacity one for sure.
Other than that, not much.