Question for you guys about the harmonic balancer on a BBC 454. How do you match one to your flywheel? The reason I ask is that I changed mine out (as it was bad) and purchased one from AutoZone. I just purchased the one for my motor and it looked the same as my old one. The issue I am having is I have a vibration once accelerating and on plane. Nothing at idle. The vibration is continuous. I’m not sure what flex plate I have as I did not build the motor. If they do not match could it cause a continuous vibration?


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I currently have a vibration when I take off and once I get on plane it dissipates but when ever I get on the gas it becomes more noticeable. I have went thru the pump and all good there. I have adjusted the degree pitch of my motor as well (did that several times). I had new u joints put in last summer when I fixed the seals on the motor. Could it be my u joints? Possible incorrect ones? I am currently at a loss and any help would be much appreciated. Thx.


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