Thread: 621 bellhousing
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Old 02-02-2016, 01:49 AM
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Hawkeye Hawkeye is offline
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Default Re: 621 bellhousing
I'm sure others will chime in, but my understanding is 69 and up had the GM on the side next to the part number. 68 and earlier has the GM where the cast line is down the center.

Please correct me if I have it all wrong.

Thanks,
Marty
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