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IMO ....an item like this should never "fail". How many 35 year old PLUS OEM dampners have you seen be loose? ... or even move ??... I have seen many a Mopar engine and have only seen ONE dampner "move" ..and it was because the guy soaked it in solvent for a couple of days.

I think a part like this should have a lifetime warranty on it.... unless it was physically damaged.

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but how many "gurus" and books out there, say to NOT use your 35 year old, OEM dampner, on a performance engine build, and to upgrade to something of higher quality?

was this a stock rebuild? stock cam, low compression, exhaust manifolds, etc. or is the compression bumped up, larger cam, headers, better heads, etc?

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I've had an OEM damper ring "slip" on a street/strip 383. I didn't notice that it had come loose 'til I put it on my 440.
Admittedly it had seen lots of abuse, but the OEM ones slip too.
That's not going to stop me from using a factory damper when I don't need an SFI one though...