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harmonic balancer diameter?

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Old Apr 3, 2006 | 11:23 PM
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jj22ee
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harmonic balancer diameter?

On my rebuilt 390 I have got a new harmonic balancer. The motor was pulled out of a 73 f100. Should this be a 7" or a 7.5" balancer? Maybe this will explain why my pointer is off.
 
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Old Feb 25, 2011 | 07:37 PM
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ceetwarrior
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Hey guys, my OE FoMoCo balancer is a single belt unit where the balancer is part of the pulley (or vise-versa). It's 6.5" diameter. Here's a pic:




The only balancer I can find is this style at 7.5":

I know the water pump pulley was pretty close to it before I tore it all apart. Will this still work for my application?? Now if the pulley itself is still 6.5", I guess I'd be fine. BUT if the balancer part is now pushed backwards towards the crank do I need a different spacer? Any knowledge, thanks!
 
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