Harmonic Balancer ID Needed

[Larry B.]

I need a balancer for my '61 FI. Need to know what the below balancer is for. I can't get any numbers from it. Any ideas? Thanks

[David L.]

Re: Harmonic Balancer ID Needed

The balancer looks like a 1966 or 1967 low HP balancer (GM # 3861968, 3861970, or possibly 3896904). GM # 3896904 is a service balancer that looks the same as the other two and is usually stamped "6904". In the thread below there are photos of an original 1966 Chevrolet 327 balancer stamped "E 6 F" (May 1966).

Dave

https://www.forums.ncrs.org/showthre...84535&uid=4583

[Larry B.]

Re: Harmonic Balancer ID Needed

Thanks Dave. Thought it might be a '61 HP balancer..no such luck!

[Joe L.]

Re: Harmonic Balancer ID Needed

Thanks Dave. Thought it might be a '61 HP balancer..no such luck!

Larry-----


While it's not an ORIGINAL balancer for a 1961, it should be 100% functional for your application. However, before I'd use this beat-up piece, I'd obtain a virtually identical new balancer which is available in the aftermarket for a rather modest cost.

[David L.]

Re: Harmonic Balancer ID Needed

Larry,

I agree with Joe.

The 59-61 Corvettes w/ H.L. Cam, H/Per., used balancer 3764318 (6 1/8" O.D.) which was replaced with 3817684 in Nov. 1962 which was then replaced with 3861968 in Nov. 1964 which was then replaced with 3861970 in Nov. 1965 which was then replaced with 3896904 in June 1971.

Dave