Re: 1970 gmc big block V6
This link should help you...double check that "3" it should be a letter and not a number; an "A" maybe?
http://www.gmcpauls.com/67-72_gmc.htm
Always like to hear about the history of the truck, especially when it gets passed down from a family member.
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MusicMan70
1961 GMC Suburban
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