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Old 06-07-2002, 01:06 PM
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Thumbs up Out of balance?

My 1st motor assembly (all new & expensive stuff) has hit a snag. I'm putting a 69' 351 W in my Bronco. I had my builder balance my motor with a 69' damper(3 bolt hole). I then decided for a serpentine swap- knabbed parts from 91' LTD Crown Victoria(timing cover out). This damper has four bolt holes.

Can I just swap balancers or is there a proper way?

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Old 06-07-2002, 02:08 PM
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Balancing engines is not really a science in the sense that you have a perfectly balanced rotating assembly, there are calculations made that take into account projected weights of pistons at speed and other imaginary numbers. That being said as long as your new balancer has the same external balance pad as your old 69 balancer then you can go ahead and swap them. As near as I know all 351W are externally balanced and this would mean all of them would have the same style of balancer. They never drill holes or put Mallory metal into a balancer anyway. The problem now becomes one in which should you use the newer flex plate or flywheel also to have a matched assembly, I would just to be on the safe side.
“She may not look like much, but she's got it where it counts, kid. I've made a lot of special modifications myself.”

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Old 06-08-2002, 11:26 AM
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buy a 3 hole pulley from ford or march, its just the lower pulley.. i am possitively sure that march makes a lower pulley for the 3 hole damper.
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