*Update*

I went to start it this morning, and it barely started. I rev'ed it up to 3k or so a couple times, and when I let off, it would drop down to 500rpms or so, then go up to 800(where it usually idles).

So had a loud "knocking" sound to it? It sound's like a metal sheet is flapping under the motor or something.

Could I have thrown a rod or something? Valve? Bad gas?

I really need to know, cause I'm hoping to sell my motor/turbo setup soon, and it its screwed...then I'm screwed.

Thanks!