If I didn't know better,it looks to me like some kind of heat exchanger??
Are the two smaller openings threaded,they also look if they have a tapered seat.

Hopefully someone with a better idea will chime in soon.


1950 Chevy Advance Design 3100 in Scotland
In the Stovebolt Gallery
More pix on Flickr.
I've definately got this truck thing in my blood ... my DNA sequence has torque settings
"Of all the small nations of this earth,perhaps only the ancient Greeks surpass the Scots in their contribution to mankind" Winston Churchill.