GTO JONES,
As you can see in last videos, the motor was not idling well at all when it was last delivered. When Paul last dyno'd the motor, I believe he noticed an oil leak at the valley pan. He addressed the valley pan but apparently a significant vacuum leak was missed. We replaced the intake gaskets and the motor is idling much better. After we fixed the vacuum leak and started the motor..the exact same knocking noise was present. So I think it's safe to say that the knocking noise is not from a vacuum leak. The gas tank is brand new and the gas thats in the tank is maybe 3-4 months old.
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