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Old 08-09-2016, 06:30 PM   #1
Darkgrace
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WTB 1972 350 4x4 Exhaust Manifolds 3989036

Need a pair of Exhaust manifolds for the new project truck. Looking for casting 3989036. These are the Ram Horn straight dump for a 1972 Chevy SB 350. Thanks in advance for the help.
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Old 08-09-2016, 09:09 PM   #2
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Re: WTB 1972 350 4x4 Exhaust Manifolds 3989036

i have a pair that were on a 72, i will check this week. condition unknown
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Old 08-10-2016, 11:11 AM   #3
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Re: WTB 1972 350 4x4 Exhaust Manifolds 3989036

Thanks
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Old 08-13-2016, 05:54 AM   #4
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Re: WTB 1972 350 4x4 Exhaust Manifolds 3989036

i will get in shed sunday, i been workin stupid hours
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Old 08-15-2016, 07:15 PM   #5
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Re: WTB 1972 350 4x4 Exhaust Manifolds 3989036

no luck, i musta got rid of them.
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Old 08-15-2016, 08:40 PM   #6
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Re: WTB 1972 350 4x4 Exhaust Manifolds 3989036

Are you looking for original? If not, checkout Speedway Motors.

http://www.speedwaymotors.com/Smooth...Raw,94194.html

Of course they are out of stock right now, but they have other options. http://www.speedwaymotors.com/Shop/C...ifolds/15.html
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Old 08-15-2016, 11:24 PM   #7
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Re: WTB 1972 350 4x4 Exhaust Manifolds 3989036

i have over 10 pairs of these,great southwest manis---277.39shipped
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Old 08-16-2016, 11:56 AM   #8
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Re: WTB 1972 350 4x4 Exhaust Manifolds 3989036

Thanks for looking.
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Old 08-16-2016, 11:57 AM   #9
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Re: WTB 1972 350 4x4 Exhaust Manifolds 3989036

Can you send me pictures of a set. Thanks
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Old 08-24-2016, 06:00 PM   #10
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Re: WTB 1972 350 4x4 Exhaust Manifolds 3989036

Still Looking Please!
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Old 08-24-2016, 07:00 PM   #11
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Re: WTB 1972 350 4x4 Exhaust Manifolds 3989036

I have a serviceable pair that came off a 1972 C50. I am putting the engine and trans in my 49 Studebaker farm truck, and can't used these manifolds (well, I could use the right side, but prefer to make them match, so I am using some different log style. Would rather use these, but the left one interferes with my steering box.

I think the number you cited is a 1970 number. Don't believe it was used in 1972, but I am not a manifold expert by any means, and could be wrong.

The ones I have are drilled for smog, but the holes have been plugged. I don't know for a fact they are original the C50. One is 386711, which is for certain a 1972 number, but I didn't see a casting number on the other one. They look alike. Don't know about truck usage, but that number was used on both sides of a 1972 Corvette with the LT-1. One broken stud. I haven't tried pulling it. I don't think I even soaked it with penetrating oil. Either it will come out or you end up drilling and tapping.

I can send you pics, or post them here. PM me if you want me to send pics to an email address.

$100 plus actual shipping for the pair.
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Old 08-24-2016, 08:11 PM   #12
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Re: WTB 1972 350 4x4 Exhaust Manifolds 3989036

http://www.engineslimited.com/exhaust.html
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Old 09-07-2016, 07:29 PM   #13
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Re: WTB 1972 350 4x4 Exhaust Manifolds 3989036

Quote:
Originally Posted by gmc 2500 4x4 View Post
Yes i tried them. No luck!
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Old 09-07-2016, 09:18 PM   #14
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Re: WTB 1972 350 4x4 Exhaust Manifolds 3989036

I have a pair that were on a 1972 K-5. I just pulled them off and their sitting in my shop. I can get better pics tomorrow.
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Old 09-07-2016, 09:45 PM   #15
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Re: WTB 1972 350 4x4 Exhaust Manifolds 3989036

I think what Kinsolver72 just posted is probably what you want. I can't read the casting number. Not sure how serious you are about originality.

I have a pair, but numbers are not even close to what you posted.

Also, I MAY decide to use one of them. Just can't make up my mind right now.

Mine are 386711 and 14081238. The 386711 was commonly used on Corvettes in 1971 & 1972.

They have provisions for smog tubes, but the holes are plugged with metal plugs.

I promised pics, so here they are. Sorry for the crappy quality.
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Old 09-07-2016, 09:53 PM   #16
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Re: WTB 1972 350 4x4 Exhaust Manifolds 3989036

Pics.
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Old 09-07-2016, 09:55 PM   #17
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Re: WTB 1972 350 4x4 Exhaust Manifolds 3989036

If you're interested I could do $85 plus shipping.
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Old 09-08-2016, 05:06 PM   #18
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Re: WTB 1972 350 4x4 Exhaust Manifolds 3989036

Quote:
Originally Posted by kingsolver72 View Post
If you're interested I could do $85 plus shipping.
Whats the casting number?
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Old 09-08-2016, 05:28 PM   #19
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Re: WTB 1972 350 4x4 Exhaust Manifolds 3989036

Quote:
Originally Posted by LynnB View Post
I think what Kinsolver72 just posted is probably what you want. I can't read the casting number. Not sure how serious you are about originality.

I have a pair, but numbers are not even close to what you posted.

Also, I MAY decide to use one of them. Just can't make up my mind right now.

Mine are 386711 and 14081238. The 386711 was commonly used on Corvettes in 1971 & 1972.

They have provisions for smog tubes, but the holes are plugged with metal plugs.

I promised pics, so here they are. Sorry for the crappy quality.
Thanks, Need without smog.
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Old 09-08-2016, 06:56 PM   #20
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Re: WTB 1972 350 4x4 Exhaust Manifolds 3989036

Little better pic.
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Old 09-08-2016, 06:59 PM   #21
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Re: WTB 1972 350 4x4 Exhaust Manifolds 3989036

Casting 3932461
Let me know if you want them.
Thanks.
Scott
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Old 09-14-2016, 12:13 PM   #22
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Re: WTB 1972 350 4x4 Exhaust Manifolds 3989036

Got what we needed thanks all.
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