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Anyone recognize these exhaust manifolds?

Posted By: bfly

Anyone recognize these exhaust manifolds? - 06/08/22 04:09 PM

Anyone recognize these manifolds.
Can’t read the numbers on the first one.
Thanks in advance

Attached picture 697E2450-D3F5-4B22-8FEC-AC973B403788.jpeg
Attached picture 2A13D891-5D08-4158-A7AE-D23AF55A9ADE.jpeg
Posted By: moparx

Re: Anyone recognize these exhaust manifolds? - 06/08/22 04:51 PM

those are 318 A-body manifolds. if i remember correctly, that is.
they should measure around 1 7/8" or so pipe diameter at the flange that bolts to the manifold.
maybe someone can correct me if i am wrong.
beer
Posted By: 6PakBee

Re: Anyone recognize these exhaust manifolds? - 06/08/22 06:27 PM

3614368
'72-'74 A body
340-360
Posted By: moparmarks

Re: Anyone recognize these exhaust manifolds? - 06/08/22 08:32 PM

Looks like 3614395 to me. 73-74 318
Posted By: MoparMike1974

Re: Anyone recognize these exhaust manifolds? - 06/09/22 05:28 AM


Looks like 318. If they were 340 the passenger side would be large output still. I would say 73+ since there are bosses for the heat shield on driver side.
Posted By: 6PakBee

Re: Anyone recognize these exhaust manifolds? - 06/09/22 12:31 PM

Originally Posted by moparmarks
Looks like 3614395 to me. 73-74 318


You are correct, I misread the casting number. frown
Posted By: moparmarks

Re: Anyone recognize these exhaust manifolds? - 06/09/22 01:19 PM

Originally Posted by 6PakBee
Originally Posted by moparmarks
Looks like 3614395 to me. 73-74 318


You are correct, I misread the casting number. frown

Ya was kind of hard to read. I had to use my 250 readers with a magnifying glass. scope
Posted By: Cab_Burge

Re: Anyone recognize these exhaust manifolds? - 06/09/22 05:08 PM

If the center exhaust port has a divider, they are 340/360 manifolds, if no divider they are 318 manifolds scope
The 273 and 318 ports are smaller a slightly different port shape also scope
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