I was thinking about that to. I talked to the shop owner and he actually said that he would tear into the other motor to see if any of the parts could be used with my motor. He said that he would be able to tell me in two days or so.

Now that I'm doneish freaking out about this thing grenading on me. I figure that I will bring mine home tomorrow and tear it down while I wait for him to tell me about that other motor. That way I actually have an idea on what will need to be replaced. Apparently the flywheel was loose and ground a little bit into the Case cover, the crank moved forward, back as well as up and down. The piston is toast and it will need a bore hopefully leaving enough cylinder wall, that's all he could tell me about it without splitting the case.

Are there any other things that are probably going to be wrong or that I should replace anyway?

I REALLY appreciate the help with this task, I am pretty intimidated about doing a rebuild on it, I've worked on car/truck engines all my life but I have nerve tore into a bike motor. So it will be a learning experience.