Unknown GM exhaust manifold to ID

[harvest]

I have this manifold with part number that I can't read to figure out what it's from? Anyone possibly know by looking at it and can identify?  

 

Thank you.

 

 

 

 

 

[harvest]

Late '60s Camaro?  

[lump]

Harvest, 

IF I am correct that the hard-to-read casting number on your manifold is 3932376, then it was used in Chevy small block V8 engine applications, including Chevelle, Nova, Camaro, and Monte Carlo with 307, 350, and (in Monte Carlo) the small-block 400. You'll note that it does not have holes for the A.I.R. smog system, which matches the description which goes with that casting number. Also, those hard-to-read casting DATE codes on the back side SEEM to look like the last character is a "0," which would fit with the 1970 production year... appropriate for that casting number. 

[harvest]

Lump, Thank you for that very helpful information. I appreciate your shared knowledge. 

[54vicky]

to possibly add to what lump wrote the rib on casting was to hold a sheet metal housing that hot air pipe fit too.it was either a tin tube that ran too the air cleaner it was also a flexible tube on some years.notice the holes they were for rivets to attach the housing

[lump]

Very welcome, Harvest. Lots of folks on here help each other this way. I've been the beneficiary of much wonderful advice and information from here myself.