When I purchased my 13b engine , it came with this cast iron manifold. Can
anyone help identify what it's original application might have been?  The
standard cast manifolds I have weigh around 13 pounds. This one only weighs
7 pounds.  It looks like it might have had a second pipe coming out of it,
but it may have had a plate welded over that exhaust port.  Thanks for any
and all opinions, of course.  Paul Conner

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