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Old 10-02-2015, 12:52 PM   #12
RichardJ
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Join Date: Apr 2010
Location: So Cal
Posts: 1,415
Re: I've never seen this before

It's obvious I don't know anything about the diesel engines. I saw the v6 valve cover and knew they had a big 478 gas engine and jumped to the wrong conclusion. I thought the cover tag read OH-478, but after the last much more knowledgeable posts I found the DH-478 on 6066 GMC's web page.
http://6066gmcguy.com/toroflow.html

Very cool. Thanks
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'67 GMC 2500, 292, 4spd, AC
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