Internal or External Balanced Harmonic Damper?

NeionDeion said

It wasn't vibrating, I had a coolant leak coming from the timing chain cover. I ordered a new and correct timing chain cover, the one that was on the engine was a 273 one with the extra bolt hole and no timing marks. I figured I should change the balancer since it's already off?

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That’s a good plan to change it but u don’t really know what they did if anything to the motor. U can mark the old damper the same as a new one or change the damper that’s for a 360 and hope for the best. If it doesn’t vibrate with the new one ur probably good to go. If it vibrates u will have to put the old one back on. That one should work for u. Bolt the weight on it. Kim