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Discussion Starter #1
Swapped my 86 350 block for a 76 block 4 bolt main, The harmonic balancer is bigger on the 4 bolt thus not letting the pump bracket fit. Going in my 68 RS. Is there an aftermarket that would work ? Thanks

Bill
 

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Discussion Starter #3
Tom -
so exchanging the balancer will not effect the way the eng. runs ? I was afraid of vibration.
 

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A larger balancer will absorb more vibration. You may want to check with a more qualified engine person, but it has been done many times. You might consider a new aftermarket balancer, of the smaller diameter. If the engine was a 400 (externally balanced) you could not swap the balancers.
 
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