Inline 250, need some expert advice

[c10hevy]

I think the engine isn't running like it should. sounds like a pinging or possibly knocking? I'm not entirely sure, I'm new at diagnosing engine problems. Here's a video to give you guys an idea of what I'm working with.

http://youtu.be/cvko_jc01Zg

Some more great news, tightening the intake exhaust manifold bolts, the intake ears decided it was time to break up with the rest of the manifold.
Any ideas besides a whole new manifold?



Would this cause the engine to run like it is, obviously it I'snt going to help, but would it cause the sound and performance I'm experiencing?

I really appreciate all the help Ive found on here and my truck wouldn't be running at all without your guys help.