Help Decoding Exhaust Manifolds.
 

If I remember correctly,
Someone on the forum has a Book that covers the Castings numbers on Intake and Exhaust manifolds.

I used my Normal searches and some of Same Cast # manifolds that I found on E bay:rolleyes: looks different.
I think it has something to do with the LH 24 & RH 6 under the casting #.

So Here is my Question.

Does anyone know what this Pair of Exhaust Manifolds came off of?

Left manifold has a casting # of 3832473 with LH 24 under it.
Edit for Future Reference this casting number is 3932473.
Thanks 1970cstblazer for the info.


Right Manifold has a casting # of 3838956 with a RH 6 under it.

Thanks in advance for the help.:chevy::chevy::chevy:

My guess is a 69/70 307cid.?

Attachment 2414934

Attachment 2414935

Re: Help Decoding Exhaust Manifolds.
 

Top one is 3932473 which is a LH 1969-70 2WD. The LH 24 refers to the side and which mold it was cast in. K series 4WD trucks use a RH straight dump manifold 3932465 on both sides.

https://67-72chevytrucks.com/vboard/...1&d=1726438793

3838956 does not exist. However, 3896956 is a '67-'70 RH manifold for 2WD 307, 327, 350 W/O A.I.R.

Re: Help Decoding Exhaust Manifolds.
 

So the second number is a 9.

That makes sense.

Thank You so much.:metal:

Re: Help Decoding Exhaust Manifolds.
 

Just adding what my book says:
3932473: Left hand, 307/350, 69-70 Passenger car, W/O A.I.R., angled dump, no bracket

3896956: Right hand, 283/307/327, 67-68 Truck, W/O A.I.R., angled dump, no bracket

Re: Help Decoding Exhaust Manifolds.
 

Thanks

I Appreciate the info.:metal:

Re: Help Decoding Exhaust Manifolds.
 

Is the 465 correct for a 71 K20 too?

Re: Help Decoding Exhaust Manifolds.
 

336711 is correct for all K series 1971 trucks and Blazers.

Re: Help Decoding Exhaust Manifolds.
 

Thank you for the info

Re: Help Decoding Exhaust Manifolds.
 

Link to page:
http://www.gmpartswiki.com/getpage?pageid=21508