Camo, that is definitely too much scoring for something that you'd want any longevity out of, but having said that it doesn't mean it wont run, and at this point you have nothing to lose, especially if you can get it running at no cost.
IF it were me, i wouldn't bother with donor pistons etc, but i'm lazy, and the machine is fairly old. See if you can get it running and if not, start to play around with it and use it as a learning tool.
