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Old 07-29-2015, 11:11 PM   #1
71CHEVYSHORTBED402
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Looking for exhaust manifold(s) for 1971 Chevy 402

71 Chevy, SWB, 2WD, 402

Looking for a flawless. Finish doesn't matter, I can have that done.

Seems I need at least the RH side without A.I.R ports. I may also be interested in a pair. The part numbers for not A.I.R. are:
3994045 LH
333846 RH


I may also be interested in a pair with A.I.R. ports (plugged up), or at least the LH side. One of the manifolds was replaced, and if I remember right it was the LH side. In other words, my manifolds don't match. The part numbers for A.I.R. type are:
343787 LH
353030 RH


Incidentally, this truck never had the A.I.R. pump. I don't believe these were replaced before I replaced the one, so if it was the LH side that was replaced, then GM slapped on the A.I.R type w/o it having the an A.I.R. pump. Has anyone seen this?

Anyone know the history on A.I.R. emissions? I think I've read that was beginning 1972. I suspect whether or not a truck had A.I.R. varied by State regulation.
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71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly kit for restoring the (a) truck from the ground up. My build thread, and more on the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025
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Old 07-29-2015, 11:31 PM   #2
bluek5
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Re: Looking for exhaust manifold(s) for 1971 Chevy 402

I may have one or a pair with the A.I.R. ports. I will double check what I have if you are interested.
Paul
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Old 07-29-2015, 11:34 PM   #3
71CHEVYSHORTBED402
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Re: Looking for exhaust manifold(s) for 1971 Chevy 402

Quote:
Originally Posted by bluek5 View Post
I may have one or a pair with the A.I.R. ports. I will double check what I have if you are interested.
Paul
Thanks Paul. Unless I discover the A.I.R. is wrong for this truck, I'm interested.
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71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly kit for restoring the (a) truck from the ground up. My build thread, and more on the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025
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Old 07-29-2015, 11:55 PM   #4
c1069
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Re: Looking for exhaust manifold(s) for 1971 Chevy 402

mine are
3994045N
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69 c/10 step side 454/400 with 3.07
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Old 07-30-2015, 04:27 PM   #5
bluek5
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Re: Looking for exhaust manifold(s) for 1971 Chevy 402

I tried to upload some pictures. I was unable to, got a message saying a security token was missing. Send me your email and I will send you some pictures.
Paul
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