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Author Topic: 69 camaro 327 exhaust manifold #'s needed  (Read 12730 times)
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« on: August 06, 2006, 06:31:16 PM »

Hello, Im looking for the correct exhaust manifold part #'s for a 69 327 With A/C, turbo 350
Any help appreciated




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rich69rs
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« Reply #1 on: August 06, 2006, 06:43:44 PM »

Chevrolet by the Numbers 1965-69; pp 218 and 220:

1969 Camaro 327/210 hp, 307/200 hp, or 350/250, 255, 300 hp engines w/auto transmission and no A.I.R.;

LH side p/n:  3942529
RH side p/n:  3932376

These manifolds were also used in 1969 on Chevelle and Chevy II 307 and 350 engines with auto tranny and no A.I.R.
« Last Edit: August 06, 2006, 06:48:11 PM by rich69rs » Logged

Richard Thomas
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« Reply #2 on: August 06, 2006, 06:59:51 PM »

I too have that book as well as Cars and Parts 55-93 casting #'s. Unfortuanetly it doesn't list anything with A/C, although other years list different part #'s for With A/c or Without.
Because this is an early car 11D, is it possible this info wasn't listed? They do list the 307 mani's
Thanks
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rich69rs
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« Reply #3 on: August 06, 2006, 07:05:03 PM »

I don't believe air conditioning had any impact on the exhaust manifold for the base 327 engine.  Only other part numbers that I know that were used on 327/210 hp Camaro in 1969 are:

LH 3942527 and RH 3946826. 

The "527" and "826" manifolds are shown as correct for all manual transmission, with A.I.R., small block Camaro applications for 1969 including the 302 Z28 engine.  These manifolds have A.I.R. drilled and tapped connections.  If A.I.R was not used, the ports were plugged.  (See JohnZ's comment below.) 

From personal experience, I removed a set of the "527" and "826" manifolds from a 69 327 base coupe that had a 3 speed manual and no A.I.R.  The manifolds were required because of the 3 speed manual trannsmission.  A.I.R had been removed so the ports were plugged.  (See KurtS and JohnZ's comments below.) This "527" manifold is currently on my car. 

In 1969 Camaro SB applications, there is a distinct difference in the RH manifolds between a standard transmission ("826" manifold) and an auto transmission ("376" manifold).   The "376" manifold incorporates a heat stove, is wider, with the heat stove riveted to it.  (The "826" manifold for standard transmission cars does not have the heat stove, since the Thermac / heat stove was an emmission system only applicable to an auto tran setup.)

I believe the manifolds you need are the "529" and the "376" manifolds.

Attached pic shows the "527" manifold on my engine.  Since the only fundamental difference between it and the correct "529" manifold is the A.I.R. ports, I decided to go ahead and use it.  The A.I.R. ports and hex plugs are clearly visible. 

I will also post a pic of the RH side of my engine with the "376" manifold and heat stove.

« Last Edit: August 07, 2006, 01:27:56 PM by rich69rs » Logged

Richard Thomas
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« Reply #4 on: August 06, 2006, 07:40:19 PM »

Great info Rich.
interesting enough, the Left manifold # is 3942528, which I couldn't find. The right mani, is an incorrect 80's style with reinforcment bars
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rich69rs
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« Reply #5 on: August 06, 2006, 07:43:52 PM »

RH side showing "376" manifold - no A.I.R. connections - heat stove visible.
« Last Edit: August 06, 2006, 07:46:35 PM by rich69rs » Logged

Richard Thomas
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« Reply #6 on: August 06, 2006, 08:36:40 PM »

Thanks Rich, these are great reference picture's. I guess I could be wrong about the 528, although it sure looks like an 8.
In anycase, you've given me the information I need to find the correct RH mani, and I appreciate it.

Here's a picture of the left. The motor here is a 350 I put in it to move it around, as the original 327 cylinders were full of water. the machine shop had to take it to .030 just to clean it up.

I also added a picture of my $250 score, it was purchased sight unseen through a for sale sign on a 69 mercury cougar 1/4 window @ the long beach swap meet in california. a/c, disc brake car

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« Reply #7 on: August 06, 2006, 09:29:34 PM »

$250 swap meet special
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GS STAGE 1
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« Reply #8 on: August 06, 2006, 09:40:21 PM »

pic 2
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« Reply #9 on: August 06, 2006, 09:42:27 PM »

The owner didn't even know what engine it had Roll Eyes
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« Reply #10 on: August 06, 2006, 09:44:01 PM »

dirty, but scarless interior
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rich69rs
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« Reply #11 on: August 06, 2006, 10:55:35 PM »

What a deal!  Your $250 score is one of the best deals I've heard of.  Regardless of what you decide to do with the car, you can't beat the initial investment cost.

With regard to your LH manifold, I'll bet the "8" is a "9" in which case your LH manifold is p/n: 3942529 which, according to the references, would be correct for 1969 Camaro 307/327 with auto tranny.

Richard
« Last Edit: August 06, 2006, 10:59:24 PM by rich69rs » Logged

Richard Thomas
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« Reply #12 on: August 06, 2006, 11:22:22 PM »

The A.I.R. ports are clearly visible with the factory installed hex plugs still there. Plugs were installed since the 327 engine that it was originally installed on did not have A.I.R. (3 speed manual trans). 

That car would have had a smog system on it from the factory. All manual small blocks had them in 69. Smiley
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« Reply #13 on: August 07, 2006, 09:40:28 AM »

The "527" and "826" manifolds are shown as correct for all manual transmission, with or without A.I.R., small block Camaro applications for 1969 including the 302 Z28 engine.  These manifolds have A.I.R. drilled and tapped connections.  If A.I.R was not used, the ports were plugged.   

From personal experience, I removed a set of the "527" and "826" manifolds from a 69 327 base coupe that had a 3 speed manual and no A.I.R.  The manifolds were required because of the 3 speed manual trannsmission.  Since there was no A.I.R., the ports were plugged from the factory.  The "527" manifold is currently on my car.

Plugs weren't used in the exhaust manifolds on non-A.I.R. engines - they used the same 527 and 826 castings, but they weren't drilled or tapped for the air manifolds. The only engines that used factory-installed plugs in the exhaust manifold openings were those that specified RPO KD1 (Less Air Injection) for overseas export.
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« Reply #14 on: August 07, 2006, 12:44:34 PM »

Kurt / John:

Makes sense that the non-drilled manifolds would be used as much as possible with heat stove variants being used as needed for auto trans applications. 

Since all SB, manual tranny Camaros in '69 had smog, the manifolds I referenced above and in the one pic, were obviously plugged at a later date - when someone canned the smog system. 

As an aside, it is amazing what these things go for on eBay.  The LH manifold (as shown in the pic) is on my engine, the RH manifold, being a non heat stove variant, was of no value to me so I sold it a while back on eBay.  You would have though the thing was made of platinum - because of the correct casting number for Z28 (as well as other manual tranny applications - in this case a 327/210 Hp w/3 speed manusl)

Thanks

Richard
                  
« Last Edit: August 07, 2006, 01:34:13 PM by rich69rs » Logged

Richard Thomas
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