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Old 11-07-2020, 11:30 AM   #6
gmc684x4
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Join Date: Jul 2012
Location: Whitehorse yukon
Posts: 1,218
Re: Identification of my 12 Bolt

Google I found a table excerpt from the new SA design book 67 72 chevy trucks
Has a table listing Diff stamp codes listed HC states 3.73 posi 1967

Gmc Pauls also hase code Hc listed as 3.73 posi no year listed

If you choose look inside on there site page 103 I see they List it in 1969 so that code will be for 67 to 69

https://www.cartechbooks.com/how-to-...1967-1972.html

Last edited by gmc684x4; 11-07-2020 at 11:39 AM.
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