Re: Timing Gear Back Lash
Cam gears can be noisy if too loose [ .010"+]. Most engines back in the day had fiber cam gears and I've changed more than I would have liked to because of that problem. One way to check is to use the timing pin. Very carefully with engine running push the pin into the gear and see if that helps with the noise. Removing the fan belt is a bit safer.
However, it doesn't sound [pun] as though thats your problem. I agree with loose lifters, either worn in the bores or excessive lash. But I'd also recommend looking at the distributor drive. Your noise sounds strange to me.
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