Harmonic Damper for Goodwrench 350
 

I am installing a new Goodwrench 350. The harmonic damper off my original 305 is galled in the sealing area so I am going to replace it. Also, the original timing marks on the 305 chain cover are in the 12:00 position which is different than the bolt on timing marks that came with the new 350.

The local NAPA store can get me a new harmonic damper that fits a 77-86 350. LMC also sells a 350 damper for 77-86. Is that the right harmonic damper? I want to make sure the TDC/timing indicator matches correctly with the damper.

Re: Harmonic Damper for Goodwrench 350
 

They will work just use the correct timing tab. Your crate engine should have came with two tabs. I've got a adjustable tab, so I'm not sure which one to use. The tab depends on the size of the balancer. I'm sure if you purchase it from NAPA they will sell you the correct tab to work with the balancer.

Re: Harmonic Damper for Goodwrench 350
 

Hamonic Balancer 8in from Summit Racing # SUM-161358
http://store.summitracing.com/partde...115&rsview=sku

Timing tab for 8in balancer from Summit Racing # PRO-141-202
http://store.summitracing.com/partde...rt=PRO-141-202

Prices are resonable but Im not sure about shipping costs.

Re: Harmonic Damper for Goodwrench 350
 

Thank you very much for the info and yes I have the 2 tabs that came with the new engine.

Re: Harmonic Damper for Goodwrench 350
 

I bought my 8" balancer from a local GM dealer for like $60.

Re: Harmonic Damper for Goodwrench 350
 

I have that engine and I used a Pioneer w/ engraved timing marks 6 3/4 " balancer nice quality piece. There are some that say 8" is better .

Re: Harmonic Damper for Goodwrench 350
 

Yep...Pioneer makes a nice balancer for about $60 and a factory balancer is about the same price also. Summit shipping is free, you just pay a handling charge.