I would like to buy a JD 9660 STS combine with about 1000 on the engine. I ask about the crank on this combine engine. I was told not to be concerned about it because it had made it past 300 hours. He said there where two company that made the crank and that you had a good chance that it had the better crank in it. What do you guys think about this The price is right. but no warranty