NOS 3860010 8" harmonic balancer / damper SHP L78 L72 396 427 454

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NOS 3860010 8" harmonic balancer / damper SHP L78 L72 396 427 454

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08-11-2025, 11:04 PM

AnthonyS AnthonyS is offline

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NOS 3860010 8" harmonic balancer / damper SHP L78 L72 396 427

Hi Gang, a cool NOS treat here.

An NOS in the old GM box large diameter 8" balancer 3860010 cast 3870325 and I think another part number is 3879623 - it's (double) stamped 0010 as well.

The keyway and the timing line mark are aligned.

The box was untouched for more than 50 years, I just opened it today - it's dated 04-24-75

There's some flash oxidization / I hesitate to call it surface rust, but it should clean up easily. It's perfect of course functional wise, just needs paint. Rubber is good.

SHP Special High Performance HiPo for Corvettes Camaros Chevelles Novas

L78 L72 L89 ZL1 L88 396 427

Lots of photos below for the whole picture.

This is a genuine new fifty year old part that is original and has the look and function you want.

Cheers all,
Anthony

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