Author Topic: 68 L48 Harmonic Balancer  (Read 614 times)

hrlyfxdl

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68 L48 Harmonic Balancer
« on: February 20, 2018, 09:32:55 PM »
I've read through all the posts, and online info, I can find and haven't really found a confirmed answer. I'm looking to get an original harmonic balancer for my 68 Camaro. I'm having rebuilt and install a 1968 350 CI to put into it. I've looked to try and decipher and find a correct harmonic balancer. I've narrowed the part number down to 3896966 (I think), but as I search that part number I see many variations. Can someone point me in the right direction of what I should be looking for to differentiate a 67/68 balancer from a 69 (as far as I can tell by what I've read they are different even with the same part number). There are a bunch for sale on Ebay, but some say they cover from 67 to 74, some say 69 to 74, some say 67/68 and I don't know enough about them to know for sure which one I should seek out. Thanks for any input.
« Last Edit: February 20, 2018, 10:11:04 PM by hrlyfxdl »
1968 Camaro SS 350 8L346775
07A  E107  TR 712  U-U

Shane

william

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Re: 68 L48 Harmonic Balancer
« Reply #1 on: February 20, 2018, 10:45:36 PM »
Whatever you do, don't use a '69-up balancer. For '69, Chevy moved the timing mark.

hrlyfxdl

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Re: 68 L48 Harmonic Balancer
« Reply #2 on: February 20, 2018, 11:14:12 PM »
That's what I was worried about, thank you for the notice. Any other info. on what I should look for in finding the right balancer, may a pic of the correct one, would be great. Thanks
1968 Camaro SS 350 8L346775
07A  E107  TR 712  U-U

Shane

william

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Re: 68 L48 Harmonic Balancer
« Reply #3 on: February 20, 2018, 11:34:17 PM »
If you can find it the November 1972 Car Craft had a great article about what to look for. Here's a pic from the article.

bertfam

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Re: 68 L48 Harmonic Balancer
« Reply #4 on: February 20, 2018, 11:40:21 PM »
The 3896966 is the balancer you want and the difference between the 67/68 and 69 balancer is where the index mark is located.

The 67/68 index mark is directly in line with the keyway and the 69 was moved 10 degrees counter clockwise (see picture below)

Ed
Ed "Bert" Bertrand
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hrlyfxdl

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Re: 68 L48 Harmonic Balancer
« Reply #5 on: February 21, 2018, 12:21:44 AM »
And would this apply to balancers for the 350 CI, not just the Z/28 302? I found a multitude of 3896966 balancers but each one looks to be offset as described and not center with the Keyway. I did find one 7173 balancer, but the seller says it's for a 302, and it's the only one I could find with the timing line centered with the Keyway. Argh.....gonna be a tough part to locate I think.
1968 Camaro SS 350 8L346775
07A  E107  TR 712  U-U

Shane

bertfam

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Re: 68 L48 Harmonic Balancer
« Reply #6 on: February 21, 2018, 12:38:49 AM »
The part number (3896966) is 67/68 350 only, but the key way index applies.

Ed
Ed "Bert" Bertrand
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hrlyfxdl

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Re: 68 L48 Harmonic Balancer
« Reply #7 on: February 21, 2018, 01:45:13 AM »
Ok, thanks Ed. I'll stay on the lookout now that I know what I need specifically. Thanks for the input. Hope this helps someone else down the line.
1968 Camaro SS 350 8L346775
07A  E107  TR 712  U-U

Shane