Identify this Air Cleaner Base

[Jonesy]

I have an open element air cleaner base. Not sure what it came off. It may have been in with my 67 z/28 smog car that I owned.
http://www.yenko.net/attachments/449596-IMG_2052.jpg

[Jonesy]

#2
http://www.yenko.net/attachments/449598-IMG_2053.jpg

[Jonesy]

#3
There is a threaded stud between 2 of the pipes. With all the pipes, I am thinking smog, but not sure.

http://www.yenko.net/attachments/449600-IMG_2056.jpg

[Jonesy]

Anybody got an idea?? http://www.yenko.net/ubbthreads/images/graemlins/beers.gif