Re: 8BA cam position
For the cam to move rearward, the cam gear bolts would have to come loose. Not sure if you can see anything through the distributor hole. Other than bearings, flywheel bolts are a possibility, as would be piston related problems (although more likely a "top end" type noise). No metal or odd stuff in the bottom of the pan?
Terry
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'30 Model A Speedster
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'66 Fairlane four door / "warmed up"  302
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