Hey Johndoh, if you buy this, there is every chance the crankshaft, camshaft and etc will be fine. You might find it quicker to simply buy a new piston and cylinder rather than having the old one re-bored.
When you strip it down check the oil pump plunger. Mine was badly worn where the camshaft runs against it. I did track down a replacement but they wanted $500 plus postage. I ordered a piece of 5/8 silver steel and made a replacement, cost me about $15.
Bob