Help! Small block 360 has a knocking sound

dano said

How are the water pump and alternator bearing/bushings? Any slop. What does it do when you put it in gear?

On your compression test, was that cold, hot and did you add oil in the cylinder before testing it? Why do you think it had carbon build up?

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I like the question about what does it sound like when you put it in gear. If it gets louder that can indicate an exhaust leak. Do you have any issues with backfiring at all?
I have another question, at what rpm is the engine idling in the video? Because it seems kinda fast to me. What is your manifold vacuum at idle and rpm?