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Author Topic: '69 exhaust manifold.  (Read 6888 times)
tom carroll
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« on: February 04, 2007, 05:26:58 PM »

can anyone give me the correct exhaust manifold casting for a z10, 350, 4 sp with ac.
Are the exhaust manifolds different for automatic and manual trans? Shouldn't be, but the one's
I'm finding state they are for auto. trans.
Thanks
Tom
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william
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« Reply #1 on: February 04, 2007, 05:59:50 PM »

LH 3942527, RH 3946826. These are AIR manifolds for manual trans applications. Auto trans did not have AIR so manifolds are different.

Same as Z/28; repros are available.
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rich69rs
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« Reply #2 on: February 04, 2007, 06:06:39 PM »

Tom:

Definitely were variations in 1969.  In general, manual trans exh manifolds had A.I.R. ports, auto trans manifolds did not have A.I.R. ports.  Also, the RH side exh manifold for auto tranny applications in '69 was modified to accomodate a heat stove.

See following link of CRG post where this was discussed previously.

Richard

http://www.camaros.org/forum/index.php?topic=1032.0
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Richard Thomas
1969 RS
tom carroll
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« Reply #3 on: February 04, 2007, 06:13:15 PM »

LH 3942527, RH 3946826. These are AIR manifolds for manual trans applications. Auto trans did not have AIR so manifolds are different.

Same as Z/28; repros are available.
Can I assume you areeferring to smog by the term air?  
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rich69rs
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« Reply #4 on: February 04, 2007, 06:13:30 PM »

LH 3942527, RH 3946826. These are AIR manifolds for manual trans applications. Auto trans did not have AIR so manifolds are different.

Same as Z/28; repros are available.

You see these manifolds on eBay occassionally.  Last set I saw a couple of weeks ago was going for over $1200 and the acution wasn't over.  I sold a RH 3946826 manifold last year on eBay for $450.  The thing to remember is that Chevy used these same manifolds on base V8 327/307 applications with manual trans, as well as Z28 and other applications.  If you can find a base V8 (327/307) engine, that was originally coupled to a manual trans, and still has the original exh manifolds on it - you'll find these manifolds.  Check the swap meets - most people don't realize this.

However, if you look on eBay, be prepared to pay some serious $$$.
« Last Edit: February 04, 2007, 08:00:03 PM by rich69rs » Logged

Richard Thomas
1969 RS
rich69rs
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« Reply #5 on: February 04, 2007, 06:14:49 PM »

Smog / A.I.R. / air pump - same thing
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Richard Thomas
1969 RS
tom carroll
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« Reply #6 on: February 04, 2007, 06:39:25 PM »

My car does not have smog pump or any sign of ever having, buillt norwood. How can I tell if it should have.
Thx
Tom
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william
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« Reply #7 on: February 04, 2007, 08:19:10 PM »

All 69 manual trans sbs had the AIR system.
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Jerry@CHP
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« Reply #8 on: February 04, 2007, 09:05:22 PM »

A nice repro set is now available from Rick's for about $340.  I would go with them, originals are getting too hard to find and very expensive.

Jerry
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KurtS
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« Reply #9 on: February 04, 2007, 10:30:52 PM »

http://www.camaros.org/emissions.shtml has smog info.
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Kurt S
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rich69rs
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« Reply #10 on: February 06, 2007, 07:25:45 PM »

http://cgi.ebay.com/ebaymotors/1969-Camaro-302-Exhaust-Manifolds_W0QQcmdZViewItemQQcategoryZ34203QQihZ002QQitemZ120082646396QQrdZ1

As of this posting, a little over 23 hours left in the auction on eBay at the above link.  Currently at $305 for the pair.
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Richard Thomas
1969 RS
Jerry@CHP
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« Reply #11 on: February 06, 2007, 08:35:05 PM »

I think they're the repros.  Same casting date.

Jerry
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Gambitt
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« Reply #12 on: February 10, 2007, 11:58:39 AM »

Jerry,

How close to original are the repos?  I have heard they were quite different...is this true?  I would go with the repo set if they are relatively close.  Thanks.
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Jerry@CHP
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« Reply #13 on: February 14, 2007, 11:25:42 AM »

The new repros are pretty good.  When they first came out, there were problems with hitting the head bolts but that was corrected.  Now, they fit well and look like the real deal when they're on the car.  And $340 is much better than $1500.

Jerry
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Pacecarjeff
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« Reply #14 on: June 27, 2007, 11:54:44 AM »

The repros are pretty close, but like any reproduction part,
an educated observer can still tell the difference.

The font in the casting numbers is different. dates are always the same day.
But - the main giveaway is the smaller defined "nubs".
also,
The texture of the metal - the shape of the ears, ect...
If you know what you are looking at, you wont be fooled. Smiley

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