Ok, I have a turd 305 SBC in my gasser project, just until I can build a real engine, but for now i'll use it to work out all the kinks, plus I'll actually get to race it this year. So I take the oil pan off to check things out, and I find a piece of something....not sure what it is at first. Then after more checking, I find its a piece of the bottom of a piston skirt. It looks like a pretty clean break. What the heck would cause that? It's just a junkyard 305, nothing done to it. Any ideas? Should I look for something worse? Or just a fluke?