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Re: What's the deal with exhaust manifolds having the same part, with or w/o A.I.R. s
Here's a 3994045. You know, the one "not for A.I.R."? Don't know why the 30s have a ridge that runs along the side, but the 45s don't. I'm unable to locate the other two parts (333846 RH / 343787 LH) for comparisons. No pictures to be found.
http://www.ebay.ca/itm/1973-75-Chevy...item51d4ea5493
Maybe the guy responsible for sporting part numbers on exhaust manifolds got creative. I could be way off base.
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Tony
71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring the truck from ground up. With assys, the guide accts for 1000s details, OEM identifications & part numbers, written in short order. 700+ images of assm., illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025
Last edited by 71CHEVYSHORTBED402; 08-08-2015 at 12:54 AM.
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