I would simply replace the engine. It is most likely going to cost you more in parts than a replacement engine will cost and your effort will be better served retrofitting a new engine.
Without getting into the semantics of the manufacturing process, aluminum crank cases unless they have sleeved cylinders undergo a special treatment process that conditions the cylinder walls.
A fine example as a result of not checking the oil beforehand.
Starwarrior
This message was modified Jan 9, 2011 by starwarrior