Need some help..... Rebuilding my '66 Starfire 425 engine (385hp) and need a harmonic balancer. Do I have to find one specifically for a 425 or are there other GM motors using the same balancer? Compatibility charts on the ebay auctions don't give me much hope for a "generic" fit. Thanks for helping!
Mike

 

I believe yours can be rebuilt if you have it. I also believe all 65-67 V8 engines from Olds are the same (330 400 425).

 

Thanks maniac......

 

I have a couple of them if you have trouble finding one. Also one NOS.

 

What do you want for the NOS balancer?

 

My olds parts book states that the 400/425 use the same balancer, the 330 uses a different number, on that note Run to Rund do you still have the NOS balancer available? Thanks. Bob.

 

The one I have is 386351 for the 400-425 from 1965-7.

 

Hello, thanks for the reply, the part number sounds correct according to my Olds parts book, and this is the one that is NOS and is it still boxed, etc and can you send me a picture of it? Bob.

 

Hey run to rund, did you send me a private message, my browser must have blocked the pop up. Checking on the availability of the balancer. Bob.

 

Joe ( Rund to Rund ) is the 400-425 go to guy. I still have some balancers-rods I bought from him if he ever runs out of them.

 

I probably have a lifetime supply of both, lol. Since my lifetime doesn't look as long as it did 40 years ago, I think it is time to let go of some stuff. . .