I beleive  that the part is called the intake manifold.  On the passenger
side of the ending there are two tubes (about 1.5 inch od) running side by
side, they end in two cloth braided hoses (very short) that connect to the
engine.   They tubes have a bend in them and each has a stud  or bolt
sticking out the top of the tube near the end.

One of the studs has broken off, leaving a hole, on my '84 Westy, and the
local dealer want $500 for a new one.  Does anybody know where I can get a
good used one or a much cheaper new one?

thanks

Gregor