Looks like it has adjustable lifters, too!
Very nice! Once in a while the planets align and things like this happen; good for you. I had the same thing happen with a '51 Merc I bought with the hope I might be able to salvage the crankshaft. It ended up to be an excellent running engine with good compression and oil pressure. Maybe this makes up for all of the other guys that bought a "pig in a poke" that turned out to be all pig.