Anyone know where to pick up a harmonic balancer for a 63’ with 390 motor? I have a strange vibration in Park when I hold the pedal at a steady rpm. I’m thinking that may be the issue

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Why do you think it is the balancer causing the vibration ?
Was it ever replaced before that you know of ?

The engine balancer needs to be balanced with the crankshaft assembly so replacing it could have the same result you have now -- a vibration

Enjoy

Well...that’s good info...no I’ve never replaced it....any ideas of what it could be if that’s not what it is?

I have a good balancer with a repair sleeve included.

Shoot me an email with your zip code for a shipping quote.   russ85747@hotmail.com 

When was the tune brought up to spec with all new parts Last time ?

A good tune will be the very best thing to have the engine run smooth as is possible ( reduce vibration ) 

With that done you can look for the next possible solution 

grab the fan  blade and see if it moves front to back as your water pump bearing might be going bad 

Condition of motor and trans mounts ?

engines will move around more in there seat if they are out of tune or a plug is fouling for example due to lack of maintenance which is 6,000 miles for our year cars 

it is a very short interval compared to today car maintenance schedules 

Enjoy

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